Heavily simplify the test setup

[jviotti]

Signed-off-by: Juan Cruz Viotti jv@jviotti.com

[cubic-dev-ai]

No issues found across 6 files

[augmentcode]

🤖 Augment PR Summary

Summary: This PR simplifies the VS Code extension test setup by removing the TypeScript build step and running tests directly from source JS via @vscode/test-cli.

Changes:

• Updated test/vscode/.vscode-test.js to use a simpler test file glob and keep VS Code test cache/user-data dirs under build/test/vscode
• Converted the extension test entry from extension.test.ts to extension.test.js (CommonJS require)
• Adjusted fixture path handling to be relative to the test file’s directory
• Removed the legacy test/vscode/index.ts runner shim (now handled by @vscode/test-cli)
• Dropped the local tsconfig.json and TypeScript/typing-related dev dependencies from the VS Code test package

Technical Notes: Test discovery is now driven by .vscode-test.js globs, and the test package no longer compiles sources into build/test/vscode before execution.

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[augmentcode]

Review completed. 2 suggestions posted.

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