feat(projman): add visual output requirements to agents and commands

Add Visual Output sections to all projman files:
- 4 agent files with phase-specific headers (PLANNING, EXECUTION, CLOSING)
- 16 command files with appropriate headers

Headers use double-line box characters for projman branding:
- Planning phase: TARGET PLANNING
- Execution phase: LIGHTNING EXECUTION (+ progress block for orchestrator)
- Closing phase: FLAG CLOSING
- Setup commands: GEAR SETUP

Closes #273, #274

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/commands/test-gen.md

@@ -111,6 +111,19 @@ pytest tests/test_orders.py -v
 | Cargo.toml | cargo test |
 | mix.exs | ExUnit |
 
+## Visual Output
+
+When executing this command, display the plugin header:
+
+```
+╔══════════════════════════════════════════════════════════════════╗
+║  📋 PROJMAN                                                      ║
+║  Test Generation                                                 ║
+╚══════════════════════════════════════════════════════════════════╝
+```
+
+Then proceed with the test generation workflow.
+
 ## Integration with /test-check
 
 - `/test-gen` creates new tests