Remove Lua scripting stub and centralize Visual Script node palette metadata

[Krilliac]

Motivation

• Remove the standalone Lua scripting stub and references to Lua where the engine does not provide an integrated Lua runtime.
• Centralize visual script node palette metadata so the editor palette can be driven from a single source of truth in the scripting compiler.
• Update editor API comments to refer generically to script runtimes instead of enumerating removed/unsupported runtimes.

Description

• Deleted the Lua scripting engine stub files LuaScriptEngine.cpp and LuaScriptEngine.h and removed all initialization/shutdown and include references to LuaScriptEngine in lifecycle and diagnostics code.
• Adjusted diagnostic messages to reference the singular scripting engine where appropriate (reworded the diag_scripting description).
• Added a ScriptNodePaletteEntry struct and palette-building APIs to VisualScriptCompiler (GetNodePalette, GetNodeDisplayName, GetNodeCategory) and implemented a static palette in VisualScriptCompiler.cpp.
• Refactored VisualScriptPanel to build palette categories at runtime from VisualScriptCompiler::GetNodePalette() and updated UI code to use the new metadata (string usage, ImGui calls, node creation).
• Minor documentation change in EditorAutomation.h to refer to "script runtimes" and remove the Lua binding example.

Testing

• Built the engine and editor after the changes and the build completed successfully.
• Ran the engine unit tests and core diagnostics tests, and they passed without new failures.
• Manually exercised the visual scripting palette in the editor UI to verify nodes/categories populate and nodes can be added; no runtime errors were observed.

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Codex Task

[github-actions]

Code Coverage (GCC + lcov)

Utils/MemoryMonitor.h                          |85.7%    14| 0.0%  12|    -    0
Utils/MultiISA.h                               |42.9%    14| 0.0%   6|    -    0
Utils/NetworkHealthMonitor.cpp                 | 113%    15| 0.0%   2|    -    0
Utils/NetworkHealthMonitor.h                   |    -     0|    -   0|    -    0
Utils/OpaqueHandle.h                           | 282%    11| 0.0%  15|    -    0
Utils/ProcessLinux.cpp                         |16.5%   182| 0.0%  28|    -    0
Utils/Profiler.cpp                             |14.2%   113| 0.0%  15|    -    0
Utils/Profiler.h                               |36.4%    33| 0.0%  12|    -    0
Utils/RandomEngine.h                           |29.3%    41| 0.0%  12|    -    0
Utils/Result.h                                 | 100%    29| 0.0%  28|    -    0
Utils/RingBuffer.h                             | 108%    59| 0.0%  64|    -    0
Utils/ScopeGuard.h                             | 142%    36| 0.0%  51|    -    0
Utils/ScopedTimer.h                            |25.0%    12| 0.0%   3|    -    0
Utils/Serializer.h                             | 100%    48| 0.0%  42|    -    0
Utils/SparkConsole.cpp                         |28.5%   144| 0.0%  17|    -    0
Utils/SparkConsole.h                           | 100%     2| 0.0%   2|    -    0
Utils/SparkError.h                             |10.9%    55| 0.0%   6|    -    0
Utils/SplinePath.h                             |    -     0|    -   0|    -    0
Utils/StackTrace.h                             |10.8%    74| 0.0%   8|    -    0
Utils/StateMachine.h                           |54.0%    63| 0.0%  32|    -    0
Utils/StringUtils.h                            |18.1%   116| 0.0%  21|    -    0
Utils/Telemetry.h                              |20.7%   135| 0.0%  22|    -    0
Utils/ThreadDebugger.h                         |11.6%   199| 0.0%  23|    -    0
Utils/ThreadSafeQueue.h                        |27.5%    40| 0.0%  11|    -    0
Utils/TimerManager.h                           |19.8%    96| 0.0%  19|    -    0
Utils/UUID.h                                   |43.2%    37| 0.0%  16|    -    0
Utils/Validate.h                               |    -     0|    -   0|    -    0

[/home/runner/work/SparkEngine/SparkEngine/SparkSDK/Include/Spark/]
IEngineContext.h                               |7300%     1| 0.0%   1|    -    0
ServiceInterfaces.h                            | 200%     3| 0.0%   3|    -    0
Version.h                                      |    -     0|    -   0|    -    0
================================================================================
                                         Total:|29.2% 23745| 0.0%  4k|    -    0

Per-Subsystem Coverage

Subsystem	Lines	Hit	Coverage	Threshold	Status
AI	2776	694	25%	35%	❌
Animation	160	154	96.2%	35%	✅
Audio	0	0	0%	30%	✅
Camera	0	0	0%	40%	✅
Core	2248	1394	62%	40%	✅
ECS	190	114	60%	40%	✅
Editor	6082	1864	30.6%	25%	✅
GameModules	6244	3141	50.3%	30%	✅
Graphics	7202	3795	52.7%	30%	✅
Networking	3379	2247	66.5%	35%	✅
Physics	0	0	0%	35%	✅
Scripting	0	0	0%	30%	✅
Utils	7687	4865	63.3%	60%	✅

Total: 50.8% (18268/35968 lines)

[github-actions]

❌ CI Error Report

Failed jobs: windows-vs2022-Release
Errors: 0 | Test failures: 3 | Warnings: 0

Test Failures

Test	Jobs
1/1 Test #1: SparkEngineTests .................***Failed 12.43 sec	windows-vs2022-Release
[ FAILED ] Integration_NetworkingECS_ReplicationLatencyJitterPredictionReconciliation (718us, 8 assertions)	windows-vs2022-Release
0% tests passed, 1 tests failed out of 1	windows-vs2022-Release

Updated: 2026-04-10T01:33:31Z — this comment is updated in-place, not duplicated.