Fix Feature Orchestrator setup script to make it work with older versions of Powershell, Fixes AB#3547389

[shahzaibj]

Fixes AB#3547389

Fixes AB#3547389 This pull request introduces several improvements to the packaging and setup scripts for the Feature Orchestrator extension, focusing on more accurate path handling and enhanced packaging configuration. The changes help ensure that resources are correctly referenced during packaging and that path operations are more robust and reliable in the setup process. Packaging improvements: * Added --baseContentUrl . --baseImagesUrl . options to the npx @vscode/vsce package command in both the manual build instructions (README.md) and the setup script (setup-ai-orchestrator.ps1) to ensure content and image resources are properly referenced in the packaged extension. [1] [2] Path handling enhancements: * Updated the use of Join-Path in setup-ai-orchestrator.ps1 to nest path joins, improving reliability when constructing paths for developer-local.json and the Feature Orchestrator extension directory. [1] [2] Minor consistency improvements: * Standardized comments to use double hyphens instead of em dashes for clarity in setup-ai-orchestrator.ps1. [1] [2]

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