docs: switch-to-default-codegen-with-zksolc (#141)

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# Description

Switches to the default codegen with the zksolc
These changes with new version 1.5.0 of zksolc will affect a plugin
where arguments will be sent from standard json input.

## Additional context
matter-labs/hardhat-zksync#1176
matter-labs/hardhat-zksync#1062

Co-authored-by: Marko Arambasic <[email protected]>
Co-authored-by: Sabrina <[email protected]>

Author: 3 people

content/00.build/40.tooling/20.hardhat/40.hardhat-zksync-solc.md

@@ -68,8 +68,8 @@ zksolc: {
       compilerPath: "zksolc",  // optional. Ignored for compilerSource "docker". Can be used if compiler is located in a specific folder
       libraries:{}, // optional. References to non-inlinable libraries
       missingLibrariesPath: "./.zksolc-libraries-cache/missingLibraryDependencies.json", // optional. This path serves as a cache that stores all the libraries that are missing or have dependencies on other libraries. A `hardhat-zksync-deploy` plugin uses this cache later to compile and deploy the libraries, especially when the `deploy-zksync:libraries` task is executed
-      isSystem: false, // optional.  Enables Yul instructions available only for ZKsync system contracts and libraries
-      forceEvmla: false, // optional. Falls back to EVM legacy assembly if there is a bug with Yul
+      enableEraVMExtensions: false, // optional.  Enables Yul instructions available only for ZKsync system contracts and libraries
+      forceEVMLA: false, // optional. Falls back to EVM legacy assembly if there is a bug with Yul
       optimizer: {
         enabled: true, // optional. True by default
         mode: '3', // optional. 3 by default, z to optimize bytecode size
@@ -100,8 +100,8 @@ Learn more about [compiling libraries here](compiling-libraries)
 A `hardhat-zksync-deploy` plugin uses this cache later to compile and deploy the libraries,
 especially when the `deploy-zksync:libraries` task is executed.
 Defaults to `./.zksolc-libraries-cache/missingLibraryDependencies.json`.
-- `isSystem` - required if contracts use enables Yul instructions available only for ZKsync system contracts and libraries
-- `forceEvmla` - falls back to EVM legacy assembly if there is an issue with the Yul IR compilation pipeline.
+- `enableEraVMExtensions` - required if contracts use enables Yul instructions available only for ZKsync system contracts and libraries
+- `forceEVMLA` - falls back to EVM legacy assembly if there is an issue with the Yul IR compilation pipeline.
 - `optimizer` - Compiler optimizations:
   - `enabled`: `true` (default) or `false`.
   - `mode`: `3` (default) recommended for most projects. Mode `z` reduces bytecode size for large projects that make heavy use of `keccak` and far calls.
@@ -114,9 +114,16 @@ The contract names do not necessarily need to be written in full qualified form.
 The plugin will perform an include operation, attempting to match the provided contract names.
 
 ::callout{icon="i-heroicons-exclamation-triangle" color="amber"}
-**forceEvmla usage**
+The `isSystem` and `forceEvmla` arguments are deprecated in favor of `enableEraVMExtensions` and `forceEVMLA`.
+If the deprecated arguments are used, a warning will be displayed and they will be automatically switched to the new naming with the provided values.
 
-Setting the `forceEvmla` field to true can have the following negative impacts:
+Starting from zksolc version 1.5.0, the ZKSync Era Solidity Compiler will be used by default with the latest version if not specified in hardhat.config.ts
+::
+
+::callout{icon="i-heroicons-exclamation-triangle" color="amber"}
+**forceEVMLA usage**
+
+Setting the `forceEVMLA` field to true can have the following negative impacts:
 
 - No support for recursion.
 - No support for internal function pointers.