init commit of docs migration

[mikemorran]

Hey @keianhzo @j-conrad! Here is the PR for the new docs! Here's the outstanding list of things to fix up:

        - Edit button
        - Google analytics
        - Changelog placeholder
        - Search bar with algolia
        - Update read me and contributing md
        - Update with emojis for style

[mikemorran]

TO DO's before completing deployment:
- baseURL
- Edit button
- Google analytics
- Changelog placeholder
- Search bar with algolia
- Update read me and contributing md
- Update with emojis for style
- Update broken links in all existing docs

@j-conrad @keianhzo, while you wait for me to complete the merge tasks listed above, you can pull down and commit to this branch in the following directories....

Docs:
/website/docs/creators/behavior-graphs OR blender-add-on

Images:
/website/static/img/ (statics is listed as a public directory, so you can reference your assets in the docs by doing /img/{filename}

Important Notes:
When you add a document, you can change its sidebar position in the top of the file