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/workflow/plan.md

@@ -2,12 +2,7 @@
 name: plan
 description: Orchestrate 4-phase planning workflow by executing commands and passing context between phases
 usage: /workflow:plan [--agent] <input>
-argument-hint: "[--agent] \"text description\"|file.md|ISS-001"
-examples:
-  - /workflow:plan "Build authentication system"
-  - /workflow:plan --agent "Build authentication system"
-  - /workflow:plan requirements.md
-  - /workflow:plan ISS-001
+argument-hint: "[--agent] \"text description\"|file.md"
 allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
 ---
 
@@ -202,12 +197,6 @@ TodoWrite({todos: [
    - Extract goal, scope, requirements
    - Format into structured description
 
-4. **Issue Reference** (e.g., `ISS-001`) → Read and structure:
-   - Read issue file
-   - Extract title as goal
-   - Extract description as scope/context
-   - Format into structured description
-
 ## Data Flow
 
 ```
@@ -297,4 +286,4 @@ CONSTRAINTS: [Limitations or boundaries]
 
 # Phase 2
 /workflow:tools:context-gather --session WFS-123 "GOAL: Build authentication\nSCOPE: JWT, login, registration\nCONTEXT: REST API"
-```
+```