FIP-0100 committee doc & governance docs reorg

[rvagg]

Proposing as a replacement of #1212. I've not modified the content from @Tanisha-fil's PR, there's juts an additional commit in here to:

1. Make a new Governance directory in the top level
2. Move Community Governance Calls which is no longer updated into the Governance directory
3. Move FIP-100-Committee.md into a new Governance/FIP-0100 directory and name it README.md

[jsoares]

In favour of this plan.

Your PR description said you're moving the committee charter into Governance/FIP-0100/, but you're actually moving it into Governance/FIP-0100 Committee/.

It's a minor difference but it begs the question: do we expect future subdirectories to relate to specific FIPs (in which case the former format is cleaner and in line with the rest of the repo) or is the content more free-form (in which case the latter format is more flexible)?

[rvagg]

do we expect future subdirectories to relate to specific FIPs

Probably, in some form, maybe other committees or maybe something else. I think this is a good suggestion regardless, we can park anything intersecting governance & FIP-0100 in that directory.

[Tanisha-fil]

I am okay with this. The goal is to make all committee charter and updates transparent to the community on Github. I see this being met in both cases. No concerns here and thanks for the suggestions here.