[2.11.1] Remove /prime command from plugin

Fixes #41

The /prime command was a personal setup command that shouldn't have been
included in the distributed plugin. It caused confusion when users had
hooks that auto-invoked it on session start.

Users who want a prime command can add it to their personal ~/.claude/commands/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugins/compound-engineering/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "compound-engineering",
   "version": "2.11.0",
-  "description": "AI-powered development tools. 25 agents, 19 commands, 12 skills, 2 MCP servers for code review, research, design, and workflow automation.",
+  "description": "AI-powered development tools. 25 agents, 17 commands, 12 skills, 2 MCP servers for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",
     "email": "kieran@every.to",