docs: add project site

[bednar]

Proposed Changes

https://influxcommunity.github.io/influxdb3-csharp/

Checklist

• [x] Rebased/mergeable
• [x] Tests pass
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #21 (4ce5a55) into main (a49388f) will not change coverage. The diff coverage is n/a.

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@@            Coverage Diff            @@
##              main       #21   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           10        10           
  Lines          736       736           
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  Hits           736       736