chore: refactor agent configurations and update testing instructions

- Updated QA Security agent to use GPT-5.2-Codex and expanded toolset for enhanced functionality.
- Revised Supervisor agent to utilize GPT-5.2-Codex and improved toolset for code review processes.
- Modified architecture instructions to specify running Playwright tests with Firefox.
- Adjusted copilot instructions to run Playwright tests with Firefox as the default browser.
- Created documentation for coding best practices to ensure consistency and quality in project documentation.
- Established HTML/CSS style color guide to maintain accessible and professional design standards.
- Updated Playwright TypeScript instructions to reflect the change in default browser to Firefox.
- Enhanced testing instructions to clarify integration testing processes and default browser settings.
- Updated integration test scripts to align with CI workflows and improve clarity in execution.
- Created new integration test scripts for Cerberus, rate limiting, and WAF functionalities.
- Adjusted E2E testing scripts to default to Firefox and updated documentation accordingly.
- Modified GitHub Actions workflow to run the comprehensive integration test suite.

.github/instructions/playwright-typescript.instructions.md

@@ -70,7 +70,7 @@ test.describe('Movie Search Feature', () => {
 
 ## Test Execution Strategy
 
-1. **Initial Run**: Execute tests with `npx playwright test --project=chromium`
+1. **Initial Run**: Execute tests with `cd /projects/Charon npx playwright test --project=firefox`
 2. **Debug Failures**: Analyze test failures and identify root causes
 3. **Iterate**: Refine locators, assertions, or test logic as needed
 4. **Validate**: Ensure tests pass consistently and cover the intended functionality