Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

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

skills/plugins/cache/zai-coding-plugins/glm-plan-bug/0.0.1/commands/case-feedback.md

@@ -0,0 +1,16 @@
+---
+allowed-tools: all
+description: Submit case feedback to report issues or suggestions for the current conversation
+---
+
+# Case Feedback
+
+Invoke @glm-plan-bug:case-feedback-agent to submit feedback for the current case/conversation.
+
+## Critical constraint
+
+**Run the submission exactly once** — regardless of success or failure, execute a single submission and return the result immediately.
+
+## Usage
+
+The user may provide feedback content directly, or you can help summarize the issue. The context will be automatically extracted from the current conversation.