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.

conductor/.claude-plugin/plugin.json

@@ -0,0 +1,18 @@
+{
+  "name": "conductor",
+  "version": "0.1.0",
+  "description": "Context-Driven Development plugin that transforms Claude Code into a project management tool. Implements structured workflow: Context → Spec & Plan → Implement with full TDD support, track-based work units, and semantic git reversion.",
+  "author": {
+    "name": "Claude Agents",
+    "url": "https://github.com/wshobson/claude-agents"
+  },
+  "license": "MIT",
+  "keywords": [
+    "project-management",
+    "context-driven-development",
+    "tdd",
+    "planning",
+    "specifications",
+    "workflow"
+  ]
+}