Editor: Play / Deploy / Export / CI-trigger surface

[mblackman]

Editor surface: dev inner loop + developer-initiated builds (Play, on-device iteration, shareable exports, CI trigger).

Companion to #44 (ShippingV1 = release pipeline). This issue covers what the editor itself can do; #44 covers what CI ships.

Editor is not a build system. Editor is a script invoker + process supervisor + Actions trigger. Build logic lives in scaffolded shell scripts devs can read, hack, and reuse outside the editor.

P0 (foundation) — all done

• Process-spawn wrapper (Win CreateProcess / posix_spawn + stdout pipe) (Editor S1: Process-spawn wrapper #46)
• C++ project.ini reader (shared util) (Editor S2: C++ project.ini reader #47)
• Play button (spawn player pointed at current project) (Editor S3: Play button #48)
• octarine init-build-scripts scaffolder (Editor S4: octarine init-build-scripts scaffolder #49)

P1 (core dev loop) — all done

• Export Build button (runs scaffolded scripts, streams to console) (Editor S5: Export Build button #74)
• --dev-listen <port> flag + TCP reload protocol (Editor S6: --dev-listen TCP reload protocol #75)
• adb wrapper (devices/connect/install/push/logcat) (Editor S7: adb wrapper #76)
• Devices panel (local + adb + wifi + remote-TCP) (Editor S8: Devices panel #77)
• Hot-push content path (diff Lua/assets, push, signal reload) (Editor S9: Hot-push content path #78)

P2 (polish + CI integration)

• Refactor android.yml/package.yml to call scaffolded scripts (Editor S10: Refactor android.yml/package.yml to call scaffolded scripts #131)
• CI release panel (gh wrapper, tag-and-push, run watch) (Editor S11: CI release panel (gh wrapper, tag-and-push, run watch) #132)
• Embedded Play mode (Editor S12: Embedded Play mode #133)
• Multi-device fan-out (Editor S13: Multi-device fan-out #134)
• macOS notarize button (Editor S14: macOS notarize button #135)
• iOS deploy + export — gated on defer/ios reattach (Editor S15: iOS deploy + export (gated on defer/ios reattach) #136)