feat: integrate Seer AI analysis into issue details

[dcramer]

Enhanced get_issue_details to include Seer AI analysis when available, providing users with both raw issue data and AI-powered insights in a single tool call.

Changes:

• Add Seer analysis context to issue details output
• Update tool descriptions to clarify use cases
• Add formatSeerContext utility for clean analysis display
• Include tests for Seer integration
• Fix markdown formatting in documentation
• Export autofixStateFixture for testing

Fixes #360, #361

🤖 Generated with Claude Code

[codecov]

Codecov Report

Attention: Patch coverage is 81.33333% with 14 lines in your changes missing coverage. Please review.

Project coverage is 60.07%. Comparing base (3d35862) to head (0bd5fb6).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
packages/mcp-server/src/internal/formatting.ts	68.88%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #363      +/-   ##
==========================================
+ Coverage   59.46%   60.07%   +0.60%     
==========================================
  Files          77       79       +2     
  Lines        6580     6743     +163     
  Branches      495      516      +21     
==========================================
+ Hits         3913     4051     +138     
- Misses       2667     2692      +25     

Flag	Coverage Δ
evals	74.54% <ø> (?)
unittests	59.83% <81.33%> (+0.36%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.