Initial commit for Docusaurus integration

[pringshia]

Adds docusaurus v2 at docs/web.

Run from root:

yarn install
yarn docs

Note: for now I've copied over the markdown files into docs/web/docs. We can later on delete the other doc files when the migration is complete.

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TODOs:

BUG 1: react-dev-utils incompatibility between storybook and docusaurus

storybook requires this in package.json "resolutions":

"react-dev-utils": "patch:react-dev-utils@11.0.4#yarn-patches/react-dev-utils.patch",

... however docusaurus requires this in order to fix this issue + PR:

"react-dev-utils": "12.0.0-next.47"

Status: Exploring alternative solutions for docusaurus, as react-dev-utils@12 introduces other breaking changes for storybook

Resolved. Added a yarn patch with the changes from this PR directly to version 11.0.4. In an ideal world this would have been fixed in react-dev-utils@11.0.5 and not in a major version bump.

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Screenshots

[codecov-commenter]

Codecov Report

Merging #611 (5100eb0) into main (46b6118) will decrease coverage by 0.07%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main     #611      +/-   ##
==========================================
- Coverage   63.26%   63.18%   -0.08%     
==========================================
  Files          86       86              
  Lines        8230     8242      +12     
==========================================
+ Hits         5207     5208       +1     
- Misses       3023     3034      +11     

Impacted Files	Coverage Δ
...ractions/blueprints/mixins/screen_task_required.py	76.34% <ø> (ø)
...ns/blueprints/parlai_chat/parlai_chat_blueprint.py	36.48% <ø> (ø)
mephisto/operations/utils.py	34.74% <10.00%> (-1.62%)	⬇️
...phisto/abstractions/architects/heroku_architect.py	35.51% <14.28%> (+0.27%)	⬆️
mephisto/abstractions/blueprint.py	77.50% <100.00%> (ø)
...lueprints/abstract/static_task/static_blueprint.py	41.41% <100.00%> (ø)
...tractions/blueprints/mixins/onboarding_required.py	77.58% <100.00%> (ø)
mephisto/operations/supervisor.py	79.00% <0.00%> (-0.65%)	⬇️
...tractions/architects/channels/websocket_channel.py	81.39% <0.00%> (+1.16%)	⬆️

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[JackUrb]

First pass looks good. We'll remove some of the boilerplate as we decide on content/usage for the blog and elsewhere.