added benchmarks root

Author: alvin-r

pyproject.toml

@@ -218,6 +218,7 @@ initial-content = """
 [tool.codeflash]
 module-root = "codeflash"
 tests-root = "tests"
+benchmarks-root = "tests/benchmarks"
 test-framework = "pytest"
 formatter-cmds = [
     "uvx ruff check --exit-zero --fix $file",