add landing page

[cialese]

Please check if the PR fulfills these requirements

• Followed the Contributing guidelines.
• Tests for the changes have been added (for bug fixes/features) with 100% code coverage.
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (12923f3) 100.00% compared to head (eb5779e) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #242   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         8    +1     
  Lines          790       879   +89     
  Branches       120       128    +8     
=========================================
+ Hits           790       879   +89     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.