feat(cli): #1694 enable custom renderer plugin SSR contexts for API routes

[thescientist13]

Related Issue

resolves #1694

Documentation

1. document renderer plugin handling for API routes www.greenwoodjs.dev#277
   • Make website docs clearer that API Routes are "BYOB"
   • Update Renderer plugin website docs for apiRouteWorker option

Summary of Changes

1. Extend renderer plugin to run API routes for custom SSR environments
2. Document Lit Renderer plugin + API Routes + CSS Module Scripts caveat
3. Add test cases

TODO

1. Get reproduction fully working - see fix(plugins): #1633 lit css module scripts not emitting style tag content in ssr output #1693
2. do this first - enhancement(cli): #1690 eliminate api route instantiation during greenwood lifecycles #1691
3. Make some of these utils shared
4. Confirm if isolation mode makes a difference with having to manually import CSS register hook in API routes - no, it does not
5. Update Lit README to call out that register hook is needed in the API route if using CSS Module Scripts (and general API Route usage docs in general)
6. website documentation tracking issue
7. Tests
8. merge after feature(cli): #1622 add support for getStaticPaths and getStaticParams #1675