Wire up module loading to application startup (#21703)

* Early module loader bundler

* Add a module installer script

* Add dev-friendly docs

* Add real module-api dependency

* Speed up `yarn add` for mulitple modules

* Fix version check for modules

* Appease the linter

.gitignore

@@ -24,3 +24,6 @@ electron/pub
 .vscode/
 .env
 /coverage
+# Auto-generated file
+/src/modules.ts
+/build_config.yaml