Docs: Create ADOPTERS.md

[yonahd]

Please read CONTRIBUTING.md for additional information on contributing to this repository!

What this PR does / why we need it

This adds an adopters file to allow teams to display their use cases an give us the motivation to keep building this for the community.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.72%. Comparing base (6a391d3) to head (5700f3e).
Report is 75 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #266      +/-   ##
==========================================
+ Coverage   40.83%   43.72%   +2.89%     
==========================================
  Files          58       63       +5     
  Lines        2902     4064    +1162     
==========================================
+ Hits         1185     1777     +592     
- Misses       1531     2039     +508     
- Partials      186      248      +62     

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