Port /module/[slug] code from registry.coder.com to registry-v2

[bcpeinhardt]

Port /module/[slug] code from registry.coder.com to registry-v2.

[bcpeinhardt]

The backend work I was doing on /modules applies here too, so pulling this into in progress as well.

[matifali]

The tabs I want to see on /modules/[slug] pages are:

1. README.md --> renamed to docs/documentation
2. Variables --> Renamed to Inputs
3. Outputs --> [NEW]
4. Parameters
5. Apps
6. Source --> [REMOVE] and link to GitHub

Additionally, download count.

What do you think @chrifro and @bpmct?

[bcpeinhardt]

@matifali These issues (on the registry stability milestone) are specifically for describing porting existing functionality. Would you mind breaking this into it's own issue?

[matifali]

@bcpeinhardt. I extracted in #190

[Parkreiner]

This is +90% done. Two more things to do:

1. Add download count once we can start making that available
2. Render out a parameters tab once the backend JSON payloads have been updated to include that information

[bcpeinhardt]

Parameters tab is done and download count has it's own issue now, so going to close this.