Add PSScriptAnalyzer workflow for PowerShell scripts

[SamErde]

This workflow runs PSScriptAnalyzer on the repository to check PowerShell scripts for best practices and security issues.

[codacy-production]

Up to standards ✅

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[Copilot]

Pull request overview

Adds a GitHub Actions workflow to run PSScriptAnalyzer on repository PowerShell scripts and upload results as SARIF to GitHub code scanning.

Changes:

• Introduces a new PSScriptAnalyzer workflow triggered on push, pull_request, and a weekly schedule.
• Runs microsoft/psscriptanalyzer-action with a limited set of rules and emits results.sarif.
• Uploads the SARIF report via github/codeql-action/upload-sarif for code scanning integration.

[github-advanced-security]

You are seeing this message because GitHub Code Scanning has recently been set up for this repository, or this pull request contains the workflow file for the Code Scanning tool.

What Enabling Code Scanning Means:

• The 'Security' tab will display more code scanning analysis results (e.g., for the default branch).
• Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results.
• You will be able to see the analysis results for the pull request's branch on this overview once the scans have completed and the checks have passed.

For more information about GitHub Code Scanning, check out the documentation.