[WIP] Refactor constructors to use initializer lists in raylib project

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Coding agent has begun work on Refactor and fix raylib test project; move constructors to initializer lists and will update this pull request as work progresses.

Original prompt

Kannst du mir alle Konstruktoren auf die Initializer List umstellen

TITLE: Refactor and fix raylib test project; move constructors to initializer lists

USER INTENT:

• Make the project correct and clean: fix build/link errors and constructor-initialization bugs.
• Refactor code so constructors use initializer lists (user later requested converting all constructors to initializer lists).
• Keep code readable and avoid introducing new problems.

TASK DESCRIPTION:

• Fix linker error caused by not linking raylib.
• Implement ball movement and paddle collision (velocity updates, lateral impulse on paddle hit).
• Refactor code into Ball, Paddle, Game classes with headers in include/ and implementations in src/.
• Fix incorrect constructor initialization (comma operator bug / members assigned in body) by using proper initializer lists.
• Decide on destructors: ensure none are missing when classes own resources; add if needed.
• Final requested change: convert all constructors to use initializer lists.

EXISTING (what has been done so far):

• Linker problem diagnosed: undefined references to raylib functions; CMake fix proposed (find_package(raylib) / pkg-config fallback).
• A working single-file example of ball + paddle physics was provided and then converted into a refactored multi-file layout.
• Refactored files (provided by assistant):
  • include/Ball.h
  • src/Ball.cpp
  • include/Paddle.h
  • src/Paddle.cpp
  • include/Game.h
  • src/Game.cpp
  • src/main.cpp
  • CMakeLists.txt (snippet showing raylib linking)
• Multiple fixes applied to Game constructor initialization:
  • Fixed comma-operator bug when initializing paddle in initializer list.
  • Moved paddle and ball initialization from constructor body to initializer list.
• Decision documented about destructors: not required unless classes own raylib resources (e.g., Texture2D) or raw pointers. Examples shown for adding destructor if owning Texture2D.

PENDING (what still needs to be done):

• Convert all constructors across all classes to initializer lists (user explicitly requested this). Specifically:
  • Ball constructor(s) in include/Ball.h / src/Ball.cpp
  • Paddle constructor(s) in include/Paddle.h / src/Paddle.cpp
  • Game constructor already converted in later fixes, but verify consistency and correctness.
  • Any other constructors (if present) should be updated.
• Verify and test that CMake actually finds and links raylib in the user's environment (install libraylib-dev or ensure find_package succeeds).
• Optionally add destructors if future changes introduce owned raylib resources.
• Run and test the program to ensure no new runtime issues.

CODE STATE: list of files discussed and important snippets/diffs

1. CMakeLists.txt (linking raylib)

• Before (missing link -> caused undefined references):
  • main.cpp compiled but executable not linked with raylib
• After (suggested/used fix):

find_package(raylib QUIET)

add_executable(raylib_test main.cpp)

if(raylib_FOUND)
    target_link_libraries(raylib_test PRIVATE raylib)
else()
    find_package(PkgConfig REQUIRED)
    pkg_search_module(RAYLIB REQUIRED raylib)
    target_include_directories(raylib_test PRIVATE ${RAYLIB_INCLUDE_DIRS})
    target_link_libraries(raylib_test PRIVATE ${RAYLIB_LIBRARIES})
endif()

2. Single-file game example (main.cpp) — provided earlier (ball + paddle)

• Shows ball movement, collisions, lateral impulse on paddle hit and kept increased speed (no normalization).
• No constructor-related changes here; used as reference for behavior.

3. Refactored layout — relevant constructor-related snippets

Game constructor: bug and fix

• Problem: comma operator / improper initializer caused wrong initialization
• Before (buggy initialization — comma operator interpreted; or members assigned in body)

// Bad — comma operator or assignment in body
Game::Game(int screenW, int screenH)
    : screenWidth(screenW),
      screenHeight(screenH),
      paddle((static_cast<float>(screenWidth) / 2 - 50, static_cast<float>(screenHeight) - 30)),
      ball(10.0f, Vector2{ screenW/2.0f, screenH/2.0f }, Vector2{ 200.0f, 200.0f }) {}

• After (fixed; use brace-init for Vector2)

// Good — initializer list with brace-initialized Vector2
Game::Game(int screenW, int screenH)
    : screenWidth(screenW),
      screenHeight(screenH),
      paddle({static_cast<float>(screenW) / 2 - 50.0f, static_cast<float>(screenH) - 30.0f}),
      ball(10.0f, {static_cast<float>(screenW) / 2, static_cast<float>(screenH) / 2}, {200.0f, 200.0f})
{}

Paddle constructor example (before / after conversion to initializer list)

• Before (possible version assigning in body):

Paddle::Paddle(int w, int h, Vector2 pos, float spd) {
    position = pos;
    width = w;
    height = h;
    speed = spd;
}

• After (use initializer list):

Paddle::Paddle(int w, int h, Vector2 pos, float spd)
    : position(pos), width(w), height(h), speed(spd) {}

Ball constructor example (before / ...

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