fix: resolve workflow issues and PSScriptAnalyzer failures

[ruhdevops]

This PR resolves issues with CodeQL analysis and PSScriptAnalyzer by:

1. Resolving merge conflicts in webhooks/listener.ps1.
2. Reconstructing the malformed .github/workflows/ci.yml and adding Pester test automation.
3. Adding python to the CodeQL matrix in codeql.yml.
4. Adding workflow_dispatch to all major workflows to support manual triggering as requested.
5. Including Set-PSRepository PSGallery -InstallationPolicy Trusted in workflows to ensure reliable PowerShell module installation.
6. Standardizing PowerShell security scan logic across all workflows for consistent results.

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PR created automatically by Jules for task 1071457135799521633 started by @Ruh-Al-Tarikh

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