Fix: Include tests in webpack compilation as individual *.test.js files with TypeScript checking, test fixtures, and watch mode support#7856

alexr00 merged 16 commits intomainmicrosoft/vscode-pull-request-github:mainfrom

copilot/fix-e7c8c5a5-dc38-4029-b1a7-504cde95862fmicrosoft/vscode-pull-request-github:copilot/fix-e7c8c5a5-dc38-4029-b1a7-504cde95862fCopy head branch name to clipboard