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

.eslintignore

@@ -1,3 +1,5 @@
 src/vector/modernizr.js
 # Legacy skinning file that some people might still have
 src/component-index.js
+# Auto-generated file
+src/modules.ts