feat: implement auto approval with pre-receive hooks

[fabiovincenzi]

Summary

This PR is based on #11 and it introduces automatic approval and rejection for push actions by using pre-receive hooks.

Changes

1. Backend

   • Introduced autoApproved and autoRejected properties in Action.js to track automatic approvals and rejections.
   • Added setAllowAutoApproval() and setAutoRejection() methods to mark actions as auto-approved or auto-rejected.
   • Implemented attemptAutoApproval() and attemptAutoRejection() to automatically authorize or reject actions when applicable.
   • Updated pre-receive hook processing to recognize when a push should be auto-approved or auto-rejected.

2. Frontend

   • Updated PushDetails.jsx:
     • Disabled interaction with approval icons for auto-approved actions.
     • Adjusted cursor and opacity to indicate non-interactive elements.
     • Modified the attestation modal behavior to prevent opening for auto-approved action.

3. Tests & Pre-Receive Hook Changes

   • Added tests for automatic approvals and rejections in chain.test.js and preReceive.test.js.
   • Updated pre-receive hooks to return appropriate status codes for auto-approved, manually approved, and rejected pushes.
   • Verified that database operations (authorise and reject) are correctly called for auto-approved and auto-rejected actions.

4. Documentation

   • Created pre-receive.md documentation to clarify the functionality of the pre-receive hook.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 95.55556% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@83e814b). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/proxy/actions/Action.js	50.00%	2 Missing ⚠️
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Additional details and impacted files

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  Coverage        ?   62.54%           
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  Files           ?       50           
  Lines           ?     1842           
  Branches        ?        0           
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  Hits            ?     1152           
  Misses          ?      690           
  Partials        ?        0           

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