add buildkite, add index page of documentation

[Fe-r-oz]

• The code is properly formatted and commented.
• Substantial new functionality is documented within the docs.
• All new functionality is tested.
• All of the automated tests on github pass.
• We recently started enforcing formatting checks. If formatting issues are reported in the new code you have written, please correct them.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.49%. Comparing base (1214fd5) to head (67e9312).
⚠️ Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #49      +/-   ##
==========================================
+ Coverage   95.11%   95.49%   +0.37%     
==========================================
  Files           7        7              
  Lines         757      754       -3     
==========================================
  Hits          720      720              
+ Misses         37       34       -3     

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[Fe-r-oz]

Turning to draft until #61 is completed

[Fe-r-oz]

Closed in favour of #70