chore!: mark engine as production-ready for v1.0.0

[danjdewhurst]

Summary

Marks the ECS Game Engine as production-ready and triggers the v1.0.0 release via Release Please.

This PR contains only a marker file and documentation update to indicate that Phase 7 (Core Completeness) is complete.

Phase 7 Complete 🎉

All must-have features for v1.0.0 are now implemented and merged:

• ✅ Serialization & Persistence (v0.11.0) - PR feat(core): Complete Serialization & Persistence System (Phase 7.1) #60
• ✅ Scene Management (v0.12.0)
• ✅ Asset Management (v0.13.0)
• ✅ Transform Hierarchy (v0.14.0)
• ✅ Command Buffers (v0.12.0) - PR feat(core): add command buffer system for deferred operations #67

Breaking Change

This PR includes a BREAKING CHANGE: footer to trigger Release Please to bump from v0.12.0 to v1.0.0.

The breaking change signals that:

• All core features are complete and stable
• The engine is production-ready for general use
• We're committing to semantic versioning from this point forward

What's Included

This PR adds a single marker file (.v1-ready) documenting Phase 7 completion. No code changes.

Engine Capabilities (v1.0.0)

The production-ready engine includes:

Core ECS:

• Archetype-based entity storage
• High-performance queries
• System scheduling with dependencies
• Component storage optimization

Advanced Features:

• Full serialization (JSON/Binary)
• Multi-scene management with transitions
• Asset loading with hot-reload
• Transform hierarchy system
• Command buffers for deferred operations

Networking:

• WebSocket multiplayer support
• Message serialization
• Client connection management

Developer Tools:

• Event system with type safety
• Plugin architecture
• Performance tracking (dirty tracking, object pooling)
• CLI scaffolding tool

Testing:

• 784 comprehensive tests
• Full TypeScript type safety
• Complete documentation and examples

Release Process

When this PR merges:

1. Release Please will detect the BREAKING CHANGE: marker
2. It will create a release PR bumping version to 1.0.0
3. Merging that release PR will publish the v1.0.0 release
4. CHANGELOG will be automatically updated

Next Steps After v1.0.0

Phase 8: Performance & Scale (v1.1.0+)

• Query caching optimization
• Multi-threading support
• Spatial partitioning
• Memory management improvements

Checklist

• Phase 7 features all merged and tested
• Documentation complete
• Examples provided for all features
• 784 tests passing
• No breaking API changes in core features
• Ready for production use