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

.cursor/rules/hooks-guidance.md

@@ -0,0 +1,36 @@
+---
+description: "Guidance on achieving hook-like functionality in Cursor IDE"
+alwaysApply: false
+---
+
+# Hooks Guidance for Cursor
+
+Cursor does not have a native hooks system like Claude Code's PreToolUse/PostToolUse/Stop hooks. However, you can achieve similar automation through:
+
+## Formatting on Save
+
+Configure your editor settings to run formatters on save:
+- **TypeScript/JavaScript**: Prettier, ESLint with `--fix`
+- **Python**: Black, Ruff
+- **Go**: gofmt, goimports
+
+## Linting Integration
+
+Use Cursor's built-in linter support:
+- ESLint for TypeScript/JavaScript
+- Ruff/Flake8 for Python
+- golangci-lint for Go
+
+## Pre-Commit Hooks
+
+Use git pre-commit hooks (via tools like `husky` or `pre-commit`) for:
+- Running formatters before commit
+- Checking for console.log/print statements
+- Running type checks
+- Validating no hardcoded secrets
+
+## CI/CD Checks
+
+For checks that ran as Stop hooks in Claude Code:
+- Add them to your CI/CD pipeline instead
+- GitHub Actions, GitLab CI, etc.