feat: Support GitHub release title pattern matching

[vaind]

Summary

Closes #85 by adding a new gh-title-pattern input parameter for filtering releases by GitHub release titles using regex patterns.

Changes

• ✅ Added gh-title-pattern input parameter to action.yml
• ✅ Implemented GitHub API integration in update-dependency.ps1 to fetch release metadata
• ✅ Added filtering logic that works before existing version pattern filtering
• ✅ Comprehensive test coverage including error handling scenarios
• ✅ Updated documentation with usage examples and parameter description

Features

• Filter by release title patterns: Use regex to match specific release naming conventions
• Release channel support: Target stable releases with patterns like \(Stable\)$
• GitHub API integration: Uses gh api with pagination for efficient data fetching
• Robust error handling: Clear error messages when no releases match patterns
• Backward compatible: Existing workflows continue to work unchanged
• Flexible and simple: Users define their own regex patterns for any naming convention

Usage Example

# Filter for releases with "(Stable)" suffix
uses: getsentry/github-workflows/updater@v3
with:
  path: modules/sentry-cocoa
  name: Cocoa SDK (Stable)
  gh-title-pattern: '\(Stable\)$'  # Only releases with "(Stable)" suffix
  api-token: ${{ secrets.CI_DEPLOY_KEY }}

Test Results

All tests pass, including:

• ✅ Filtering by GitHub release title patterns (11 stable releases found from 398 total)
• ✅ Error handling when no releases match pattern
• ✅ Backward compatibility without title pattern

Implementation Details

The implementation uses GitHub's REST API to fetch release metadata and filters tags based on release titles before applying the existing version pattern filtering. This ensures the feature works seamlessly with all existing functionality while providing the new release channel filtering capability.

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[vaind]

@sentry review