feat : update the documentation with latets feature

[Rosh7887epitech]

This pull request introduces a new background wall asset to the client, updates the rendering system to support it, and significantly expands and clarifies the technical documentation for both the client asset pipeline and the server's ECS engine. The documentation now provides thorough details about ECS components, systems, and the execution order, improving clarity for future development and onboarding.

Client Asset Integration:

• Added a new JSON definition for the background_wall sprite, including animation and texture references (client/assets/json/background_wall.json).
• Registered the new background wall PNG asset in the embedded resource manager and ensured it is loaded at startup (EmbeddedResourceManager.cpp, AssetLoader.cpp). [1] [2] [3]
• Updated the rendering system to include the new sprite ID range, allowing the new background wall to render correctly (RenderSystem.cpp).

Documentation Improvements:

Client Asset Pipeline:

• Added a comprehensive section to the client asset documentation explaining the asset embedding process, supported asset types, generated code structure, usage patterns, and build integration. Also clarified the use of JSON for defining animations, backgrounds, and entities (assets.md).

Server ECS Engine:

• Added a new in-depth document outlining all ECS components (core, combat, AI, power-up, boss, physics, rendering, scoring, input, background) and their roles in the server engine (engine.md).
• Expanded the ECS component list in the server documentation to provide a complete, categorized overview (ecs.md).
• Detailed the implemented ECS systems, their execution order, and individual responsibilities, including a sample update loop and system descriptions (systems.md). [1] [2]
• Clarified the server's approach to rendering and audio: the server prepares rendering and audio data for clients, rather than performing these tasks directly. Updated documentation to reflect this architecture (rendering.md, audio.md). [1] [2]

[EvannBloutin]