Show project setup files in Project View

[Eduardo Villalpando Mello (edvilme)]

This pull request introduces enhancements to the Python project management features, focusing on improved project setup file detection and UI representation. The main changes include adding the ability for Python projects to discover their setup files (like pyproject.toml, setup.py, or requirements.txt), updating the tree view to display these files, and minor refactoring for clarity and consistency.

Python project setup file detection and UI improvements:

• Added a discoverProjectSetupFile method to the PythonProject interface and implemented it in PythonProjectsImpl, allowing detection of common setup files at the project root or when the project URI points directly to a setup file. [1] [2] [3]
• Updated the project tree view (ProjectView and treeViewItems.ts) to display the detected setup file as a child node under each project, with a command to open the file in the editor. [1] [2] [3] [4]

API and data model updates:

• Added a needsInstallation property to the PackageInfo interface and implemented it in PythonPackageImpl, defaulting to false. [1] [2]
• Minor API signature and import order cleanups for consistency, especially in PythonProjectManager and related files. [1] [2] [3] [4] [5] [6] [7] [8]

Test and formatting improvements:

• Refactored test imports and improved assertion formatting for clarity in newScriptProject.unit.test.ts. [1] [2] [3] [4] [5] [6]

These changes collectively enhance the user experience by making project setup files more discoverable and accessible, and improve the maintainability of the codebase.