feat: improve examples and migration guide with GitHub context (#505)

* feat: improve documentation with solutions guide and GitHub context

- Add comprehensive solutions.md with 9 complete use case examples
- Fix migration guide examples to include required GitHub context
- Update examples missing GitHub context (workflow-dispatch-agent, claude-modes)
- Enhance README with prominent Solutions & Use Cases section
- Document tracking comment behavior change in automation mode
- All PR review examples now include REPO and PR NUMBER context

Fixes issues reported in discussions #490 and #491 where:
- Migration examples were dysfunctional without GitHub context
- Users lost PR review capability after v0.x migration
- Missing explanation of tracking comment removal in agent mode

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: apply prettier formatting to fix CI

Co-authored-by: kashyap murali <km-anthropic@users.noreply.github.com>

* refactor: streamline examples and remove implementation details

- Remove 5 redundant examples (57% reduction: 12→7 files)
  - Deleted: claude.yml, claude-auto-review.yml, claude-modes.yml,
    claude-args-example.yml, auto-fix-ci-signed/
- Rename examples for clarity
  - pr-review-with-tracking.yml → pr-review-comprehensive.yml
  - claude-pr-path-specific.yml → pr-review-filtered-paths.yml
  - claude-review-from-author.yml → pr-review-filtered-authors.yml
  - workflow-dispatch-agent.yml → manual-code-analysis.yml
  - auto-fix-ci/auto-fix-ci.yml → ci-failure-auto-fix.yml
- Update all examples from @v1-dev to @v1
- Remove implementation details (agent mode references) from docs
- Delete obsolete DIY Progress Tracking section
- Add track_progress documentation and examples

Addresses PR feedback about exposing internal implementation details
and consolidates redundant examples into focused, clear use cases.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: apply prettier formatting to fix CI

Applied prettier formatting to 3 files to resolve CI formatting issues.

Co-authored-by: kashyap murali <km-anthropic@users.noreply.github.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
Co-authored-by: kashyap murali <km-anthropic@users.noreply.github.com>
Co-authored-by: Kashyap Murali <13315300+katchu11@users.noreply.github.com>

docs/usage.md

@@ -52,6 +52,7 @@ jobs:
 | `anthropic_api_key`            | Anthropic API key (required for direct API, not needed for Bedrock/Vertex)                                           | No\*     | -         |
 | `claude_code_oauth_token`      | Claude Code OAuth token (alternative to anthropic_api_key)                                                           | No\*     | -         |
 | `prompt`                       | Instructions for Claude. Can be a direct prompt or custom template for automation workflows                          | No       | -         |
+| `track_progress`               | Force tag mode with tracking comments. Only works with specific PR/issue events. Preserves GitHub context            | No       | `false`   |
 | `claude_args`                  | Additional arguments to pass directly to Claude CLI (e.g., `--max-turns 10 --model claude-4-0-sonnet-20250805`)      | No       | ""        |
 | `base_branch`                  | The base branch to use for creating new branches (e.g., 'main', 'develop')                                           | No       | -         |
 | `use_sticky_comment`           | Use just one comment to deliver PR comments (only applies for pull_request event workflows)                          | No       | `false`   |
@@ -139,7 +140,11 @@ For a comprehensive guide on migrating from v0.x to v1.0, including step-by-step
 ```yaml
 - uses: anthropics/claude-code-action@v1
   with:
-    prompt: "Update the API documentation"
+    prompt: |
+      REPO: ${{ github.repository }}
+      PR NUMBER: ${{ github.event.pull_request.number }}
+
+      Update the API documentation to reflect changes in this PR
     anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
     claude_args: |
       --model claude-4-0-sonnet-20250805