feat: add custom agents and quick-flow workflows, remove tech-spec track

Major Changes:
- Add sample custom agents demonstrating installable agent system
  - commit-poet: Generates semantic commit messages (BMAD Method repo sample)
  - toolsmith: Development tooling expert with knowledge base covering bundlers, deployment, docs, installers, modules, and tests (BMAD Method repo sample)
  - Both agents demonstrate custom agent architecture and are installable to projects via BMAD installer system
  - Include comprehensive installation guides and sidecar knowledge bases

- Add bmad-quick-flow methodology for rapid development
  - create-tech-spec: Direct technical specification workflow
  - quick-dev: Flexible execution workflow supporting both tech-spec-driven and direct instruction development
  - quick-flow-solo-dev (Barry): 1 man show agent specialized in bmad-quick-flow methodology
  - Comprehensive documentation for quick-flow approach and solo development

- Remove deprecated tech-spec workflow track
  - Delete entire tech-spec workflow directory and templates
  - Remove quick-spec-flow.md documentation (replaced by quick-flow docs)
  - Clean up unused epic and story templates

- Fix custom agent installation across IDE installers
  - Repair antigravity and multiple IDE installers to properly support custom agents
  - Enable custom agent installation via quick installer, agent installer, regular installer, and special agent installer
  - All installation methods now accessible via npx with full documentation

Infrastructure:
- Update BMM module configurations and team setups
- Modify workflow status paths to support quick-flow integration
- Reorganize documentation with new agent and workflow guides
- Add custom/ directory for user customizations
- Update platform codes and installer configurations

src/modules/bmm/agents/pm.agent.yaml

@@ -16,48 +16,25 @@ agent:
     principles: Uncover the deeper WHY behind every requirement. Ruthless prioritization to achieve MVP goals. Proactively identify risks. Align efforts with measurable business impact. Back all claims with data and user insights.
 
   menu:
-    - trigger: workflow-init
-      workflow: "{project-root}/{bmad_folder}/bmm/workflows/workflow-status/init/workflow.yaml"
-      description: Start a new sequenced workflow path
-      ide-only: true
-
-    - trigger: workflow-status
-      workflow: "{project-root}/{bmad_folder}/bmm/workflows/workflow-status/workflow.yaml"
-      description: Check workflow status and get recommendations
-
     - trigger: create-prd
       workflow: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/prd/workflow.yaml"
       description: Create Product Requirements Document (PRD)
 
-    - trigger: create-epics-and-stories
-      workflow: "{project-root}/{bmad_folder}/bmm/workflows/3-solutioning/create-epics-and-stories/workflow.yaml"
-      description: Break PRD requirements into implementable epics and stories
-
     - trigger: validate-prd
       validate-workflow: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/prd/workflow.yaml"
       checklist: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/prd/checklist.md"
       document: "{output_folder}/PRD.md"
       description: Validate PRD + Epics + Stories completeness and quality
 
-    - trigger: tech-spec
-      workflow: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/tech-spec/workflow.yaml"
-      description: Create Tech Spec (Simple work efforts, no PRD or Architecture docs)
-
-    - trigger: validate-tech-spec
-      validate-workflow: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/tech-spec/workflow.yaml"
-      checklist: "{project-root}/{bmad_folder}/bmm/workflows/2-plan-workflows/tech-spec/checklist.md"
-      document: "{output_folder}/tech-spec.md"
-      description: Validate Technical Specification Document
+    - trigger: create-epics-and-stories
+      workflow: "{project-root}/{bmad_folder}/bmm/workflows/3-solutioning/create-epics-and-stories/workflow.yaml"
+      description: Break PRD requirements into implementable epics and stories after the architecture is defined
 
     - trigger: correct-course
       workflow: "{project-root}/{bmad_folder}/bmm/workflows/4-implementation/correct-course/workflow.yaml"
       description: Course Correction Analysis
       ide-only: true
 
-    - trigger: create-excalidraw-flowchart
-      workflow: "{project-root}/{bmad_folder}/bmm/workflows/diagrams/create-flowchart/workflow.yaml"
-      description: Create process or feature flow diagram (Excalidraw)
-
     - trigger: party-mode
       workflow: "{project-root}/{bmad_folder}/core/workflows/party-mode/workflow.yaml"
       description: Bring the whole team in to chat with other expert agents from the party