feat: Add ide-only and web-only menu item filtering for platform-specific commands

## Summary
- Add ide-only and web-only boolean fields to agent menu schema
- Filter menu items based on build target (web bundle vs local IDE)
- Update BMM agent definitions with platform restrictions and improved descriptions
- Update frame-expert agent icon to 📐 and add webskip flag

## Changes

### Schema & Bundler Updates
- tools/schema/agent.js: Add ide-only and web-only optional boolean fields
- tools/cli/lib/yaml-xml-builder.js: Filter ide-only items from web bundles
- tools/cli/lib/xml-handler.js: Pass forWebBundle flag through build chain

### Agent Updates
- frame-expert: Change icon to 📐, add webskip flag, improve principle formatting
- pm: Mark workflow-init and correct-course as ide-only, advanced-elicitation as web-only
- ux-designer: Rename trigger to create-ux-design, mark advanced-elicitation as web-only
- sm: Rename triggers for consistency (story-context → create-story-context)
- analyst: Add research workflow after brainstorm, mark advanced-elicitation as web-only
- architect: Remove document field from validate-architecture, add web-only flag
- dev: Update persona and critical actions for clarity
- tech-writer: Add party-mode workflow, mark advanced-elicitation as web-only
- tea: Mark advanced-elicitation as web-only
- All agents: Standardize party-mode description

This enables platform-specific functionality where some commands only make sense
in IDE environments (workflow-init) or web interfaces (advanced-elicitation).

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

@@ -26,17 +26,17 @@ agent:
     - trigger: validate-architecture
       validate-workflow: "{project-root}/{bmad_folder}/bmm/workflows/3-solutioning/architecture/workflow.yaml"
       checklist: "{project-root}/{bmad_folder}/bmm/workflows/3-solutioning/architecture/checklist.md"
-      document: "{output_folder}/architecture.md"
       description: Validate Architecture Document
 
     - trigger: solutioning-gate-check
       workflow: "{project-root}/{bmad_folder}/bmm/workflows/3-solutioning/solutioning-gate-check/workflow.yaml"
-      description: Validate solutioning complete, ready for Phase 4 (Level 2-4 only)
+      description: Validate solutioning is complete
 
     - trigger: party-mode
       workflow: "{project-root}/{bmad_folder}/core/workflows/party-mode/workflow.yaml"
-      description: Consult with other expert agents from the party
+      description: Bring the whole team in to chat with other expert agents from the party
 
     - trigger: advanced-elicitation
       exec: "{project-root}/{bmad_folder}/core/tasks/advanced-elicitation.xml"
       description: Advanced elicitation techniques to challenge the LLM to get better results
+      web-only: true