feat: add Cursor IDE support with pre-translated configs

Add complete .cursor/ directory with rules, agents, skills, commands,
and MCP config adapted for Cursor's format. This makes ecc-universal
a truly cross-IDE package supporting Claude Code, Cursor, and OpenCode.

- 27 rule files with YAML frontmatter (description, globs, alwaysApply)
- 13 agent files with full model IDs and readonly flags
- 30 skill directories (identical Agent Skills standard, no translation)
- 31 command files (5 multi-* stubbed for missing codeagent-wrapper)
- MCP config with Cursor env interpolation syntax
- README.md and MIGRATION.md documentation
- install.sh --target cursor flag for project-scoped installation
- package.json updated with .cursor/ in files and cursor keywords

package.json

@@ -1,8 +1,77 @@
 {
+  "name": "ecc-universal",
+  "version": "1.0.0",
+  "description": "Complete collection of battle-tested Claude Code configs — agents, skills, hooks, commands, and rules evolved over 10+ months of intensive daily use by an Anthropic hackathon winner",
+  "keywords": [
+    "claude-code",
+    "ai",
+    "agents",
+    "skills",
+    "hooks",
+    "mcp",
+    "rules",
+    "claude",
+    "anthropic",
+    "tdd",
+    "code-review",
+    "security",
+    "automation",
+    "best-practices",
+    "cursor",
+    "cursor-ide"
+  ],
+  "author": {
+    "name": "Affaan Mustafa",
+    "url": "https://x.com/affaanmustafa"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/affaan-m/everything-claude-code.git"
+  },
+  "homepage": "https://github.com/affaan-m/everything-claude-code#readme",
+  "bugs": {
+    "url": "https://github.com/affaan-m/everything-claude-code/issues"
+  },
+  "files": [
+    ".cursor/",
+    "agents/",
+    "commands/",
+    "contexts/",
+    "examples/CLAUDE.md",
+    "examples/user-CLAUDE.md",
+    "examples/statusline.json",
+    "hooks/",
+    "mcp-configs/",
+    "plugins/",
+    "rules/",
+    "schemas/",
+    "scripts/ci/",
+    "scripts/hooks/",
+    "scripts/lib/",
+    "scripts/setup-package-manager.js",
+    "scripts/skill-create-output.js",
+    "skills/",
+    ".claude-plugin/plugin.json",
+    ".claude-plugin/README.md",
+    "install.sh",
+    "llms.txt"
+  ],
+  "bin": {
+    "ecc-install": "install.sh"
+  },
+  "scripts": {
+    "postinstall": "echo '\\n  ecc-universal installed!\\n  Run: npx ecc-install typescript\\n  Docs: https://github.com/affaan-m/everything-claude-code\\n'",
+    "lint": "eslint . && markdownlint '**/*.md' --ignore node_modules",
+    "test": "node scripts/ci/validate-agents.js && node scripts/ci/validate-commands.js && node scripts/ci/validate-rules.js && node scripts/ci/validate-skills.js"
+  },
   "devDependencies": {
     "@eslint/js": "^9.39.2",
     "eslint": "^9.39.2",
     "globals": "^17.1.0",
     "markdownlint-cli": "^0.47.0"
+  },
+  "engines": {
+    "node": ">=18"
   }
 }