feat: Add comprehensive Sendable conformance and thread safety

- https://argent.atlassian.net/browse/IOS-3436

Summary:
- Add ThreadSafeBox utility class for thread-safe property wrapper
- Implement Sendable conformance across all major classes and protocols:
  - Client classes (EthereumHttpClient, EthereumWebSocketClient, etc.)
  - ENS classes (ENSResolver, ENSMultiResolver, EthereumNameService)
  - ERC standard implementations (ERC20, ERC721, ERC1271, ERC165)
  - Account management (EthereumAccount, EthereumKeyLocalStorage)
  - Contract and ABI types
  - Network providers and utilities
- Convert ENSResolver to use thread-safe property access with ThreadSafeBox
- Fix ENSMultiResolver thread safety with atomic operations for queries and responses
- Update EthereumKeyLocalStorage with thread-safe address handling
- Mark classes as final where appropriate for performance
- Use @unchecked Sendable for classes with internal synchronization
- Update test classes to conform to Sendable requirements
- Ensure all protocols inherit Sendable conformance where needed

This enables safe concurrent usage across the entire web3.swift library
while maintaining backward compatibility and performance.

Author: dioKaratzas

Package.resolved

@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:5.9
 import PackageDescription
 
 let package = Package(
@@ -13,11 +13,11 @@ let package = Package(
         .library(name: "web3-zksync.swift", targets: ["web3-zksync"])
     ],
     dependencies: [
-        .package(name: "BigInt", url: "https://github.com/attaswift/BigInt", from: "5.3.0"),
-        .package(name: "GenericJSON", url: "https://github.com/iwill/generic-json-swift", .upToNextMajor(from: "2.0.0")),
+        .package(url: "https://github.com/attaswift/BigInt", from: "5.3.0"),
+        .package(url: "https://github.com/iwill/generic-json-swift", .upToNextMajor(from: "2.0.2")),
         .package(url: "https://github.com/GigaBitcoin/secp256k1.swift.git", .upToNextMajor(from: "0.6.0")),
-        .package(url: "https://github.com/vapor/websocket-kit.git", from: "2.0.0"),
-        .package(url: "https://github.com/apple/swift-log.git", from: "1.0.0")
+        .package(url: "https://github.com/vapor/websocket-kit.git", from: "2.16.1"),
+        .package(url: "https://github.com/apple/swift-log.git", from: "1.6.4")
     ],
     targets: [
         .target(
@@ -28,7 +28,7 @@ let package = Package(
                     .target(name: "aes"),
                     .target(name: "Internal_CryptoSwift_PBDKF2"),
                     "BigInt",
-                    "GenericJSON",
+                    .product(name: "GenericJSON", package: "generic-json-swift"),
                     .product(name: "secp256k1", package: "secp256k1.swift"),
                     .product(name: "WebSocketKit", package: "websocket-kit"),
                     .product(name: "Logging", package: "swift-log")
@@ -70,6 +70,14 @@ let package = Package(
                 .copy("Account/cryptofights_712.json"),
                 .copy("Account/ethermail_signTypedDataV4.json"),
                 .copy("Account/real_word_opensea_signTypedDataV4.json"),
+                .copy("Resources/ERC1271CheckerBool.sol"),
+                .copy("Resources/TestERC721.sol"),
+                .copy("Resources/ERC1271Checker.sol"),
+                .copy("Resources/Multicall2.sol"),
+                .copy("Resources/ERC721Metadata.json"),
+                .copy("Resources/ABITests.sol"),
+                .copy("Resources/ERC165Sample.sol"),
+                .copy("Resources/DummyOffchainResolver.sol"),
             ]
         )
     ]

Package.swift

@@ -0,0 +1,84 @@
+// swift-tools-version:6.1
+import PackageDescription
+
+let package = Package(
+    name: "web3.swift",
+    platforms: [
+        .iOS(SupportedPlatform.IOSVersion.v13),
+        .macOS(SupportedPlatform.MacOSVersion.v11),
+        .watchOS(.v7)
+    ],
+    products: [
+        .library(name: "web3.swift", targets: ["web3"]),
+        .library(name: "web3-zksync.swift", targets: ["web3-zksync"])
+    ],
+    dependencies: [
+        .package(url: "https://github.com/attaswift/BigInt", from: "5.3.0"),
+        .package(url: "https://github.com/iwill/generic-json-swift", .upToNextMajor(from: "2.0.2")),
+        .package(url: "https://github.com/GigaBitcoin/secp256k1.swift.git", .upToNextMajor(from: "0.6.0")),
+        .package(url: "https://github.com/vapor/websocket-kit.git", from: "2.16.1"),
+        .package(url: "https://github.com/apple/swift-log.git", from: "1.6.4")
+    ],
+    targets: [
+        .target(
+            name: "web3",
+            dependencies:
+                [
+                    .target(name: "keccaktiny"),
+                    .target(name: "aes"),
+                    .target(name: "Internal_CryptoSwift_PBDKF2"),
+                    "BigInt",
+                    .product(name: "GenericJSON", package: "generic-json-swift"),
+                    .product(name: "secp256k1", package: "secp256k1.swift"),
+                    .product(name: "WebSocketKit", package: "websocket-kit"),
+                    .product(name: "Logging", package: "swift-log")
+                ],
+            path: "web3swift/src",
+            exclude: ["ZKSync"]
+        ),
+         .target(
+            name: "web3-zksync",
+            dependencies:
+                [
+                    .target(name: "web3")
+                ],
+            path: "web3swift/src/ZKSync"
+        ),
+        .target(
+            name: "keccaktiny",
+            dependencies: [],
+            path: "web3swift/lib/keccak-tiny",
+            exclude: ["module.map"]
+        ),
+        .target(
+            name: "aes",
+            dependencies: [],
+            path: "web3swift/lib/aes",
+            exclude: ["module.map"]
+        ),
+        .target(
+            name: "Internal_CryptoSwift_PBDKF2",
+            dependencies: [],
+            path: "web3swift/lib/CryptoSwift"
+        ),
+        .testTarget(
+            name: "web3swiftTests",
+            dependencies: ["web3", "web3-zksync"],
+            path: "web3sTests",
+            resources: [
+                .copy("Resources/rlptests.json"),
+                .copy("Account/cryptofights_712.json"),
+                .copy("Account/ethermail_signTypedDataV4.json"),
+                .copy("Account/real_word_opensea_signTypedDataV4.json"),
+                .copy("Resources/ERC1271CheckerBool.sol"),
+                .copy("Resources/TestERC721.sol"),
+                .copy("Resources/ERC1271Checker.sol"),
+                .copy("Resources/Multicall2.sol"),
+                .copy("Resources/ERC721Metadata.json"),
+                .copy("Resources/ABITests.sol"),
+                .copy("Resources/ERC165Sample.sol"),
+                .copy("Resources/DummyOffchainResolver.sol"),
+            ]
+        )
+    ]
+)