Add shared entity organization, hierarchy and lifetime scripting APIs

[JamieW105]

Scripts need live entity organization and lifetime operations across language adapters. Add 17 shared Rust/runtime APIs for tags, groups, world-preserving hierarchy edits, subtree/delayed destruction, component presence and tag/radius queries. All SDKs call the same typed query dispatcher; editor Lua/JavaScript API hints are updated. Destroyed component owners stop receiving callbacks and release operations/signals at cleanup.

Stop/change review skips destroyed authored entities and suppresses translation-only diffs when an entity's parent differs from the original scene. Surviving entities with unchanged parents still contribute edits; restoring the authored parent makes local translations reviewable again. Structural edits remain runtime-only, avoiding wrong editor world positions and preserving normal Stop acknowledgements.

Reuse SceneWorld validated commands, generational references, transforms and the existing gameplay clock/signals/scheduler. Runtime metadata avoids a scene format migration; reparenting rejects shear instead of silently changing poses. No dependencies added. This is the first incremental entity slice of Phase 1: component mutation, prefabs/pooling, scene streaming, input/persistence and subsequent phases remain unfinished in the checked-in feature checklist.

Validation for the review fixes: all 70 engine-play tests passed, including two regression tests and a real authenticated Stop exchange after a component destroys its owner and reparents another entity. Both unit regressions were also executed against the pre-fix collector and failed as expected. Workspace/all-target compile check, engine-play Clippy with warnings denied, formatting/whitespace checks passed. Documentation lint/build/types/audit, all 34 site tests and documentation/exported-link checks passed. Existing SDK/world features remain covered by the CI suites. No Windows/macOS hardware compatibility claim.

Companion documentation: Rustic-Game-Engine/docs#31 (merged), with final validation in Rustic-Game-Engine/docs#33 (17 API pages, language examples, setup/lifetime/errors, expansion checklist; site lint/build/types/audit/tests passed).
Stop/change-review documentation fix: Rustic-Game-Engine/docs#34.
Runnable examples: Rustic-Game-Engine/examples#1.

Windows installer and all required CI passed for fix commit 68d11be: https://github.com/Rustic-Game-Engine/engine/actions/runs/38201074736. The full comprehensive scripting expansion remains unfinished.

Fresh Windows installer: https://github.com/Rustic-Game-Engine/engine/actions/runs/38201074736/artifacts/11725608597 (windows-installer, 21,661,427 bytes; the successful upload requires Engine/dist/RusticGameEngine-Setup-*.exe). Both review threads are resolved.

[JamieW105]

@codex review

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-12T02:38:35.578232Z	efc834d	Manual request

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Reviewed commit: efc834d838

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