Switch test runner from VS Code insiders to stable channel

[Copilot]

• Explore repository structure and understand codebase
• Run build and tests to check current state
• Identify location of downloadAndUnzipVSCode('insiders') usage - found in test/runTest.ts
• Change downloadAndUnzipVSCode('insiders') to downloadAndUnzipVSCode('stable') in test/runTest.ts
• Run build and linting to ensure no errors - both pass successfully
• Verify the change works correctly - only test/runTest.ts was modified as required
• Reverted accidental changes to main.js - restored to original state as requested

Summary

The change has been completed successfully:

• ✅ Found and updated the single instance of downloadAndUnzipVSCode('insiders') in test/runTest.ts
• ✅ Changed it to use downloadAndUnzipVSCode('stable') instead
• ✅ Reverted main.js to its original state - removed accidental modifications that changed extension loading behavior
• ✅ Only the test runner file remains modified as originally required

The main.js file has been restored to its original state with:

• require('./out/src/extension') (instead of ./dist/extension.bundle)
• extension.activateInternal(ctx, perfStats, true /* ignoreBundle */) (with the ignoreBundle parameter)

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[nturinski]

Do not change any files. If changes were made to the main.js, revert them.

[nturinski]

@copilot Do not change any files. If changes were made to the main.js, revert them.

[Copilot]

Do not change any files. If changes were made to the main.js, revert them.

Reverted the accidental changes to main.js as requested (commit 6570b8e). The file has been restored to its original state with the correct extension loading paths and parameters.

@copilot Do not change any files. If changes were made to the main.js, revert them.

Changes to main.js have been reverted (commit 6570b8e). The file is now back to its original state while preserving the intended test runner change in test/runTest.ts.