vscode: add experimental esbuild support

Created by: tjkandala

Closes #28823 (closed)

Adds ability to build the VS Code extension with esbuild. Production build time has gone from 100 seconds to 1.5 seconds on my M1 Pro MBP! Moves and modifies experimental web esbuild plugins to work with the VS Code extension.

esbuild	webpack

TODO:

• ensure no regressions with integration tests (create separate issue)

Test plan

• Steps for node extension host
  • Run yarn build:esbuild in the client/vscode directory
  • Run "Launch VS Code Extension" task in VS Code
  • Note that search and remote file browsing still work
• Steps for webworker extension host
  • Run yarn build:esbuild:web in the client/vscode directory
  • Run "Launch VS Code Web Extension" task in VS Code
  • Note that search and remote file browsing still work

App preview:

• Link
• Storybook

Check out the client app preview documentation to learn more.