feat: interactive CLI, brutalist UI, and system refinements

[xircons]

This PR merges a massive set of enhancements and stability fixes from the dev branch into main.

✨ Features

• Interactive Setup Wizard: Guided CLI experience when run without flags.
• Monochrome Brutalist UI: High-contrast design system with consistent padding and shared primitives.
• Smart Validation: Dynamic Zod schema inference across entire collections.
• Advanced REST: Support for suffix filtering (_gte, _like), sorting, and pagination metadata.
• Persistent Memory: Remembers last session configuration in ~/.config/zero-mock/config.json.

🛡️ Stability & Security

• Windows Atomic Writes: Cross-platform safe persistence with EXDEV fallback.
• Robust Locking: PID liveness checks and auto-cleaning stale locks.
• ReDoS Protection: Sanitized user input for regex-based filtering.
• Memory Leak Fixes: Explicit closure of file watchers on reload and exit.

📖 Documentation

• Completely rewritten README.md covering all new features and maintenance flows.

[github-actions]

🎉 This PR is included in version 1.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀