Refactor documentation and remove CI/CD integration references

- Updated README.md to clarify local testing instructions and added error handling for low scores.
- Removed CI/CD configuration details from CONFIGURATION_GUIDE.md and other documentation files.
- Cleaned up MODULES.md by deleting references to the now-removed github_actions.py.
- Streamlined TEST_SCENARIOS.md and USAGE_GUIDE.md by eliminating CI/CD related sections.
- Adjusted CLI command help text in main.py for clarity on minimum score checks.

README.md

@@ -192,12 +192,15 @@ agent:
   module: "my_agent:chain"
 ```
 
-## CI/CD Integration
+## Local Testing
 
-For local testing:
+For local testing and validation:
 ```bash
-# Run before committing (manual)
+# Run with minimum score check
 flakestorm run --min-score 0.9
+
+# Exit with error code if score is too low
+flakestorm run --min-score 0.9 --ci
 ```
 
 ## Robustness Score