Mainframe Engine v1.1.0

What's Changed

• README: installing the editor from a release (macOS quarantine) by @brogan89 in #21
• Godot 4 port: 2D canvas, physics and runtime rules, rendering, UI, networking, editor (ADRs 0116–0142) by @brogan89 in #22
• ProcessRunner: return at exit, not when MSBuild nodes close the output by @brogan89 in #23
• Proposals: Gameplay toolkit (G1–G7) with SVG mockups by @brogan89 in #25
• Spine casts double-sided shadows; Spine Demo shows them on a backdrop by @brogan89 in #26
• ZzFX sound designer and in-editor music editor (piano roll, VST3, MIDI, .ogg render) by @brogan89 in #24
• Proposals: Consoles (PS5 + Xbox Series) readiness, D3D12-first M11, Slang shader plan (ADR 0143) by @brogan89 in #27
• Proposal: Animation authoring (G1c–G1f) — Claude-made clips, mfe CLI, posing tools (design only) by @brogan89 in #28
• Linux Docker tests: work from git worktrees (self-contained .git) by @brogan89 in #29
• Slang is the engine's shader language (ADR 0144) by @brogan89 in #30
• Render tests: add the five missing lavapipe goldens by @brogan89 in #31
• Proposal: Terrain, procedural trees (Ez Tree), water and a forest showcase (G8) (design only) by @brogan89 in #32
• Editor link: survive sockets inherited by forked child processes (protocol 3) by @brogan89 in #35
• SongPlayer: the playhead never reads a block that is mid-push (flaky SongPlayerTests) by @brogan89 in #36
• Forest showcase: terrain, Ez Tree trees, water, post-processing and the Unreal look (G8a–G8e) by @brogan89 in #33

Full Changelog: v1.0.1...v1.1.0