feat: add Conductor plugin for Context-Driven Development

Add comprehensive Conductor plugin implementing Context-Driven Development
methodology with tracks, specs, and phased implementation plans.

Components:
- 5 commands: setup, new-track, implement, status, revert
- 1 agent: conductor-validator
- 3 skills: context-driven-development, track-management, workflow-patterns
- 18 templates for project artifacts

Documentation updates:
- README.md: Updated counts (68 plugins, 100 agents, 110 skills, 76 tools)
- docs/plugins.md: Added Conductor to Workflows section
- docs/agents.md: Added conductor-validator agent
- docs/agent-skills.md: Added Conductor skills section

Also includes Prettier formatting across all project files.

plugins/backend-development/skills/api-design-principles/assets/api-design-checklist.md

@@ -3,6 +3,7 @@
 ## Pre-Implementation Review
 
 ### Resource Design
+
 - [ ] Resources are nouns, not verbs
 - [ ] Plural names for collections
 - [ ] Consistent naming across all endpoints
@@ -10,6 +11,7 @@
 - [ ] All CRUD operations properly mapped to HTTP methods
 
 ### HTTP Methods
+
 - [ ] GET for retrieval (safe, idempotent)
 - [ ] POST for creation
 - [ ] PUT for full replacement (idempotent)
@@ -17,6 +19,7 @@
 - [ ] DELETE for removal (idempotent)
 
 ### Status Codes
+
 - [ ] 200 OK for successful GET/PATCH/PUT
 - [ ] 201 Created for POST
 - [ ] 204 No Content for DELETE
@@ -29,6 +32,7 @@
 - [ ] 500 Internal Server Error for server issues
 
 ### Pagination
+
 - [ ] All collection endpoints paginated
 - [ ] Default page size defined (e.g., 20)
 - [ ] Maximum page size enforced (e.g., 100)
@@ -36,17 +40,20 @@
 - [ ] Cursor-based or offset-based pattern chosen
 
 ### Filtering & Sorting
+
 - [ ] Query parameters for filtering
 - [ ] Sort parameter supported
 - [ ] Search parameter for full-text search
 - [ ] Field selection supported (sparse fieldsets)
 
 ### Versioning
+
 - [ ] Versioning strategy defined (URL/header/query)
 - [ ] Version included in all endpoints
 - [ ] Deprecation policy documented
 
 ### Error Handling
+
 - [ ] Consistent error response format
 - [ ] Detailed error messages
 - [ ] Field-level validation errors
@@ -54,18 +61,21 @@
 - [ ] Timestamps in error responses
 
 ### Authentication & Authorization
+
 - [ ] Authentication method defined (Bearer token, API key)
 - [ ] Authorization checks on all endpoints
 - [ ] 401 vs 403 used correctly
 - [ ] Token expiration handled
 
 ### Rate Limiting
+
 - [ ] Rate limits defined per endpoint/user
 - [ ] Rate limit headers included
 - [ ] 429 status code for exceeded limits
 - [ ] Retry-After header provided
 
 ### Documentation
+
 - [ ] OpenAPI/Swagger spec generated
 - [ ] All endpoints documented
 - [ ] Request/response examples provided
@@ -73,6 +83,7 @@
 - [ ] Authentication flow documented
 
 ### Testing
+
 - [ ] Unit tests for business logic
 - [ ] Integration tests for endpoints
 - [ ] Error scenarios tested
@@ -80,6 +91,7 @@
 - [ ] Performance tests for heavy endpoints
 
 ### Security
+
 - [ ] Input validation on all fields
 - [ ] SQL injection prevention
 - [ ] XSS prevention
@@ -89,6 +101,7 @@
 - [ ] No secrets in responses
 
 ### Performance
+
 - [ ] Database queries optimized
 - [ ] N+1 queries prevented
 - [ ] Caching strategy defined
@@ -96,6 +109,7 @@
 - [ ] Large responses paginated
 
 ### Monitoring
+
 - [ ] Logging implemented
 - [ ] Error tracking configured
 - [ ] Performance metrics collected
@@ -105,6 +119,7 @@
 ## GraphQL-Specific Checks
 
 ### Schema Design
+
 - [ ] Schema-first approach used
 - [ ] Types properly defined
 - [ ] Non-null vs nullable decided
@@ -112,24 +127,28 @@
 - [ ] Custom scalars defined
 
 ### Queries
+
 - [ ] Query depth limiting
 - [ ] Query complexity analysis
 - [ ] DataLoaders prevent N+1
 - [ ] Pagination pattern chosen (Relay/offset)
 
 ### Mutations
+
 - [ ] Input types defined
 - [ ] Payload types with errors
 - [ ] Optimistic response support
 - [ ] Idempotency considered
 
 ### Performance
+
 - [ ] DataLoader for all relationships
 - [ ] Query batching enabled
 - [ ] Persisted queries considered
 - [ ] Response caching implemented
 
 ### Documentation
+
 - [ ] All fields documented
 - [ ] Deprecations marked
 - [ ] Examples provided