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/brainstorm/system-architect.md

@@ -3,9 +3,6 @@ name: system-architect
 description: Generate or update system-architect/analysis.md addressing topic-framework discussion points
 usage: /workflow:brainstorm:system-architect [topic]
 argument-hint: "optional topic - uses existing framework if available"
-examples:
-  - /workflow:brainstorm:system-architect
-  - /workflow:brainstorm:system-architect "user authentication redesign"
 allowed-tools: Task(conceptual-planning-agent), TodoWrite(*), Read(*), Write(*)
 ---
 
@@ -369,4 +366,4 @@ System architect perspective provides:
 - [ ] **Resource Planning**: Resource requirements clearly defined and realistic
 - [ ] **Risk Management**: Technical risks identified with mitigation plans
 - [ ] **Performance Validation**: Architecture can meet performance requirements
-- [ ] **Evolution Strategy**: Design allows for future growth and changes
+- [ ] **Evolution Strategy**: Design allows for future growth and changes