Create codeql.yml

[ahmedsza]

This pull request adds a new GitHub Actions workflow for CodeQL analysis to the repository. The workflow is designed to automatically analyze the codebase for security vulnerabilities and code quality issues on a regular schedule, as well as on pushes and pull requests to the main branch.

Key additions:

• Added a new workflow file .github/workflows/codeql.yml to set up CodeQL analysis for multiple languages including C# and Ruby. This includes defining the job matrix, initializing CodeQL, and performing the analysis.
• Configured the workflow to run on push events to the main branch, pull requests to the main branch, and on a weekly schedule.
• Included steps to check out the repository, initialize CodeQL with the specified languages and build modes, and perform the analysis.