add other language drop down link to AutoGen website

[LittleLittleCloud]

Why are these changes needed?

This PR adds a 'OtherLanguage' drop down link plus link to AutoGen.Net document website

#924

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e0fa6ee) 35.19% compared to head (8deaee9) 35.19%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1573   +/-   ##
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  Coverage   35.19%   35.19%           
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  Files          44       44           
  Lines        5328     5328           
  Branches     1236     1236           
=======================================
  Hits         1875     1875           
  Misses       3299     3299           
  Partials      154      154           

Flag	Coverage Δ
unittests	35.19% <ø> (ø)

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[jackgerrits]

I wonder if this is the best place to expose this. I think it important to prominently link to this but I am worried about cluttering the navbar (which I am hoping to clean up soon)

[LittleLittleCloud]

I wonder if this is the best place to expose this. I think it important to prominently link to this but I am worried about cluttering the navbar (which I am hoping to clean up soon)

If the nav bar is already too crowded, how about putting it under resource tab?

aka
Resource->other languages->dotnet

[jackgerrits]

It's good to highlight this and we can always move it later if we need to.