Remove experiments/eval_tool_description folder (#7)

* Remove experiments/eval_tool_description folder

This experimental code has been superseded by the main application's
ToolQualityService, which provides the same functionality (evaluating
tool descriptions on clarity, completeness, and conciseness) but is
integrated into the API.

The experiments folder was:
- Not referenced in the main application code
- Not documented in README
- Not part of Taskfile automation
- Redundant with existing ToolQualityService functionality

* Trigger CI checks

* Enable show_full_output in claude-review workflow to diagnose error

* Fix claude-review workflow: remove gh pr comment instruction

The action automatically handles PR commenting via MCP server
(mcp__github_comment__update_claude_comment), so Claude doesn't need
to manually use gh CLI commands. The prompt was asking Claude to use
a tool that wasn't available, causing the workflow to fail.

* Revert workflow changes - fixed via GitHub App installation

Author: Nigel Brown