Revert "temporary remove all ee-tests"

This reverts commit 03986fc.

Author: rakita

crates/ee-tests/README.md

@@ -0,0 +1,30 @@
+# revm-ee-tests
+
+Shared test utilities and integration tests for **revm** and **op-revm**.
+
+## Running Tests
+
+```bash
+# Run all tests
+cargo test -p revm-ee-tests
+
+# Run a specific test subset (e.g. TIP-1016 state gas tests)
+cargo test -p revm-ee-tests tip1016
+```
+
+## Directory Structure
+
+```
+crates/ee-tests/
+├── src/
+│   ├── lib.rs              # Snapshot comparison utilities (TestdataConfig, compare_or_save_testdata)
+│   ├── revm_tests.rs       # Integration tests for mainnet revm
+│   └── op_revm_tests.rs    # Integration tests for op-revm (Optimism)
+├── tests/
+│   ├── revm_testdata/      # Golden JSON snapshots for revm tests
+│   └── op_revm_testdata/   # Golden JSON snapshots for op-revm tests
+├── tip1016.md              # TIP-1016 State Gas test plan
+└── Cargo.toml
+```
+
+Snapshot files are auto-generated on first run and compared on subsequent runs.