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>

CHANGELOG.md

@@ -1898,12 +1898,6 @@ This is a **breaking change release** with significant architectural improvement
 - **Intelligent Modes**: Auto template selection and precise planning
 - **Full Command Suite**: analyze, chat, execute, mode:auto, mode:bug-index, mode:plan
 
-#### 🏷️ Issue Management Commands
-- `/workflow:issue:create` - Create new project issues with priority/type
-- `/workflow:issue:list` - List and filter issues by status/assignment
-- `/workflow:issue:update` - Update existing issue status and assignments
-- `/workflow:issue:close` - Close completed issues with resolution
-
 #### 📋 Enhanced Workflow Commands
 - `/workflow:plan-verify` - Pre-execution validation using dual analysis
 - `/workflow:test-gen` - Generate comprehensive test workflows