refactor: Add update and render functions to Scene, SceneObject and Component classes

[MichalSzandar]

• add update and render functions
• store weak_ptr to the owner of the object in Component
• change c++ standard to 20 (for jthread)

[Copilot]

Pull request overview

Introduces an update/render lifecycle to the scene graph: Scene, SceneObject, and Component now expose update(const Context&) and render(SDL_Renderer*), with Component storing a weak_ptr back to its owning SceneObject. The component-creation pipeline (Parser → ComponentRegistry → concrete creators like BlinkComponent::createBlinker) is threaded through with the new owner argument, the C++ standard is bumped to 20 (for std::jthread), and the clang-tidy header filter is consolidated into a single regex.

Changes:

• Add virtual update/render to Component (now non-default-constructible, owns a weak_ptr<SceneObject>) and propagate the corresponding methods through SceneObject and the new Scene::update/Scene::render.
• Thread std::shared_ptr<SceneObject> owner through ComponentRegistry::build, Parser::buildComponent, and BlinkComponent::createBlinker/constructor.
• Bump CMAKE_CXX_STANDARD to 20 and rewrite .clang-tidy header filtering to a single negative-lookahead regex.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
CMakeLists.txt	Raises C++ standard from 17 to 20.
src/CMakeLists.txt	Adds new scene/Scene.cpp to the runtime_core target.
include/scene/Scene.hpp / src/scene/Scene.cpp	New Scene::update/Scene::render iterating over objects (render gated on isVisible).
include/scene/SceneObject.hpp / src/scene/SceneObject.cpp	Adds update/render forwarding to components; setTransform now takes a const ref.
include/scene/components/Component.hpp	Makes Component abstract, removes default ctor, stores weak_ptr owner, adds pure-virtual update/render.
include/scene/components/BlinkComponent.hpp / .cpp	Updates ctor to take owner, implements update (TODO) and render (no-op), updates creator signature.
include/scene/components/ComponentRegistry.hpp / .cpp	ComponentCreatorFunc and build now take an owner shared_ptr.
include/parser/Parser.hpp / src/parser/Parser.cpp	buildComponent accepts and forwards the owner to the registry.
.clang-tidy	Replaces HeaderFilterRegex/ExcludeHeaderFilterRegex pair with a single negative-lookahead regex.

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