feat: add inline CI, review, and merge status to mergify stack list

[jd]

Enhances mergify stack list to show CI status, review status, and
merge conflict state for each PR in the stack.

• Default: summary line (CI: ✓ passing | Review: ✓ approved)
• --verbose: detailed check names and reviewer names
• --json: full structured data (ci_checks, reviews, mergeable)
• Conflict indicator (✗ conflicting) when PR has merge conflicts

Fetches check-runs and reviews in parallel with bounded concurrency.
Callers like stack open skip the extra fetches via include_status=False.

Claude-Session-Id: 2d9f4a52-4a1d-4a50-a459-3b57847dec9f

Depends-On: #1116

[jd]

This pull request is part of a stack:

1. feat: add mergify stack sync CLI command (#1116)
2. feat: add inline CI, review, and merge status to mergify stack list (#1117) 👈

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🔴 ⛓️ Depends-On Requirements

Waiting for:

• depends-on = Mergifyio/mergify-cli#1116 [⛓️ feat: add mergify stack sync CLI command #1116]

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Requirement based on the presence of Depends-On in the body of the pull request

• depends-on = Mergifyio/mergify-cli#1116 [⛓️ feat: add mergify stack sync CLI command #1116]

🔴 👀 Review Requirements

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• #approved-reviews-by>=2

or

• author = dependabot[bot]

or

• author = mergify-ci-bot

or

• author = renovate[bot]

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• any of:
  • #approved-reviews-by>=2
  • author = dependabot[bot]
  • author = mergify-ci-bot
  • author = renovate[bot]

🔴 🔎 Reviews

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• #review-requested = 0

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• #review-requested = 0
• #changes-requested-reviews-by = 0
• #review-threads-unresolved = 0

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Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:

🟢 📕 PR description

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• body ~= (?ms:.{48,})

[Copilot]

Pull request overview

Enhances the mergify stack list command to surface per-PR CI status, review status, and merge-conflict (mergeable) state, with richer display options and JSON output suitable for scripting.

Changes:

• Extend stack list entries with CI checks, reviews, and mergeable, and fetch those details via GitHub APIs with bounded concurrency.
• Add --verbose/-v output to show individual check names and reviewer names; extend --json output with structured status fields.
• Update stack open to skip the additional status fetches via include_status=False; update docs and tests accordingly.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
mergify_cli/stack/list.py	Adds CI/review/mergeable fields, parallel status fetching, and verbose + formatted display output.
mergify_cli/stack/cli.py	Wires new --verbose/-v option into stack list.
mergify_cli/stack/open.py	Avoids extra CI/review API calls when listing is only used to open PRs.
mergify_cli/github_types.py	Adds mergeable to the PR TypedDict.
mergify_cli/stack/skill.md	Documents the enhanced stack list behavior and flags.
mergify_cli/tests/stack/test_list.py	Adds/updates tests for JSON fields, summary output, and verbose output.
mergify_cli/tests/stack/test_open.py	Updates PR payload mocks to include mergeable.

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