Add timeout on github client

[neel-astro]

Description

As of now GitHub client does not have timeouts in any form, as a result whenever there is an issue on the GitHub end, Astro CLI ends up in a hang state. This PR introduces an aggressive timeout to the GitHub client because the use case for the API calls is not a blocker for any command execution, and it will ensure seamless UX even in case GitHub is experiencing an outage.

🎟 Issue(s)

Related #1291

🧪 Functional Testing

List the functional testing steps to confirm this feature or fix.

📸 Screenshots

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📋 Checklist

• Rebased from the main (or release if patching) branch (before testing)
• Ran make test before taking out of draft
• Ran make lint before taking out of draft
• Added/updated applicable tests
• Tested against Astro-API (if necessary).
• Tested against Houston-API and Astronomer (if necessary).
• Communicated to/tagged owners of respective clients potentially impacted by these changes.
• Updated any related documentation

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.19 ⚠️

Comparison is base (4fbffff) 87.31% compared to head (da3508a) 87.12%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1290      +/-   ##
==========================================
- Coverage   87.31%   87.12%   -0.19%     
==========================================
  Files         113      114       +1     
  Lines       13255    13289      +34     
==========================================
+ Hits        11573    11578       +5     
- Misses        992     1021      +29     
  Partials      690      690              

Impacted Files	Coverage Δ
cmd/root.go	91.42% <100.00%> (ø)

... and 1 file with indirect coverage changes

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