feat(ci): auto assignment for good first issues

[exploreriii]

Enables auto-assignment to good first issues

[exploreriii]

ops was aiming to test this on fork

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main    #1314      +/-   ##
==========================================
+ Coverage   92.14%   92.29%   +0.14%     
==========================================
  Files         139      139              
  Lines        8482     8515      +33     
==========================================
+ Hits         7816     7859      +43     
+ Misses        666      656      -10     

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[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

This pull request introduces an automated GitHub Action that assigns "Good First Issue" labeled issues to users who comment with /assign. It includes a new JavaScript handler script, a corresponding workflow configuration, and a changelog entry documenting the feature.

Changes

Cohort / File(s)	Summary
Workflow & Script Implementation \.github/scripts/bot-gfi-assign-on-comment.js, \.github/workflows/bot-gfi-assign-on-comment.yml	New GitHub Action workflow triggered on issue comments containing /assign. Executes handler script that validates comment, checks for "Good First Issue" label, and conditionally assigns issue to commenter (if unassigned) or posts current assignee information (if already assigned).
Documentation CHANGELOG.md	Added changelog entry under Unreleased > Added: "Enable auto assignment to good first issues (#1312)".

Sequence Diagram(s)

sequenceDiagram
    participant GH as GitHub
    participant Runner as GitHub Actions<br/>Runner
    participant Script as GFI Assign<br/>Script
    participant API as GitHub<br/>REST API
    
    GH->>Runner: Trigger on issue_comment event
    Runner->>Script: Execute with github & context
    Script->>Script: Validate /assign command & non-bot user
    Script->>Script: Verify "Good First Issue" label
    alt Issue has assignee
        Script->>API: Post "already assigned" comment<br/>with current assignee info
        API-->>Script: Comment created
    else Issue unassigned
        Script->>API: Assign issue to commenter
        API-->>Script: Assignment successful
    end

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

✨ Finishing touches

• 📝 Generate docstrings

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📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 8980910 and 84baa92.

📒 Files selected for processing (3)

• .github/scripts/bot-gfi-assign-on-comment.js
• .github/workflows/bot-gfi-assign-on-comment.yml
• CHANGELOG.md

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