dropdown versioned docs

[hanbollar]

Fixes #29

following common conventions for documentation pages

• [x] going to have 'docs.mrjs.io' reroute to 'docs.mrjs.io/v/latest'
• [x] right now copying directly from previous public-versioning saves
• [x] create and add the actual drop down section (going to get help from lobau for design of this once setup as functioning)
• [ ] ... more todos
• [ ] switch render.com to use all-versions-smoo.sh

foldering:

• public/v/main: what is directly on MRjs main
• public/v/latest: a copy of what is the latest version release
• public/v/vX.Y.Z: whatever version release it is

---

in future, might want to capture and actually rebuild previous versions with previous smoo.sh runs (that's more involved so leaving as future todo)

[render[bot]]

Your Render PR Server URL is https://documentation-pr-58.onrender.com.

Follow its progress at https://dashboard.render.com/static/srv-cp5rkmnsc6pc738p1fo0.

[hanbollar]

forgot to mention - had to switch, for the versions we had available, to actually rebuilding from their specific smoo.sh because relative links and full domain links, etc

• versions that will be pure copy from public (because theyre not documentation version stamped)
  • v0.5.4
  • v0.6.0
  • v0.6.1
• versions that can be rebuilt with smoo.sh
  • v0.6.2
  • v0.6.3
  • v0.6.4

copying:

• we'll be doing a copy into all-saved/main so that is always updated on regular smoo.sh run
• we'll be doing a copy of whatever is the most recent version to /latest/ as well on the all smoo.sh run

[hanbollar]

next - add version and relative to _template for the main run, then i should be able to duplicate that across the versions

[hanbollar]

@lobau - i'm going to walk this through with you tomorrow as it's at a state where 'it works' but there's a few things i wanted to check with you for final polish before i merge this in - i'm going to put this on the back burner for this week though now since it's basically completed