Refactor command YAML headers: replace examples with argument-hint

**Summary:**
Updated all 62 command files in `.claude/commands` directory to improve parameter documentation clarity by replacing `examples` field with descriptive `argument-hint` field.

**Changes:**
- Added/improved `argument-hint` for all commands based on usage patterns
- Removed `examples` field and all example items from YAML headers
- Maintained all other YAML fields (name, description, usage, allowed-tools)
- Deleted obsolete commands: workflow/issue/*, workflow/session/pause.md, workflow/session/switch.md
- Cleaned up temporary analysis files

**Rationale:**
The `argument-hint` field provides clearer, more concise parameter documentation than example lists, improving command discoverability and usability in the Claude Code interface.

**Files Modified:** 62 command files
**Lines Changed:** -1570 insertions, +192 deletions

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

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

.claude/commands/task/breakdown.md

@@ -2,11 +2,7 @@
 name: breakdown
 description: Intelligent task decomposition with context-aware subtask generation
 usage: /task:breakdown <task-id>
-argument-hint: task-id
-examples:
-  - /task:breakdown IMPL-1
-  - /task:breakdown IMPL-1.1
-  - /task:breakdown impl-3
+argument-hint: "task-id"
 ---
 
 # Task Breakdown Command (/task:breakdown)

.claude/commands/task/create.md

@@ -2,11 +2,7 @@
 name: create
 description: Create implementation tasks with automatic context awareness
 usage: /task:create "title"
-argument-hint: "task title"
-examples:
-  - /task:create "Implement user authentication"
-  - /task:create "Build REST API endpoints"
-  - /task:create "Fix login validation bug"
+argument-hint: "\"task title\""
 ---
 
 # Task Create Command (/task:create)

.claude/commands/task/execute.md

@@ -2,11 +2,7 @@
 name: execute
 description: Execute tasks with appropriate agents and context-aware orchestration
 usage: /task:execute <task-id>
-argument-hint: task-id
-examples:
-  - /task:execute IMPL-1
-  - /task:execute IMPL-1.2
-  - /task:execute IMPL-3
+argument-hint: "task-id"
 ---
 
 ### 🚀 **Command Overview: `/task:execute`**

.claude/commands/task/replan.md

@@ -2,11 +2,7 @@
 name: replan
 description: Replan individual tasks with detailed user input and change tracking
 usage: /task:replan <task-id> [input]
-argument-hint: task-id ["text"|file.md|ISS-001]
-examples:
-  - /task:replan IMPL-1 "Add OAuth2 authentication support"
-  - /task:replan IMPL-1 updated-specs.md
-  - /task:replan IMPL-1 ISS-001
+argument-hint: "task-id [\"text\"|file.md]"
 ---
 
 # Task Replan Command (/task:replan)
@@ -38,12 +34,6 @@ Replans individual tasks with multiple input options, change tracking, and versi
 ```
 Supports: .md, .txt, .json, .yaml
 
-### Issue Reference
-```bash
-/task:replan IMPL-1 ISS-001
-```
-Loads issue description and requirements
-
 ### Interactive Mode
 ```bash
 /task:replan IMPL-1 --interactive