Feature: mouse input

[bobis33]

User Story

As a user, I want to handle mouse input (movement, buttons, wheel) so that I can interact with the engine or game scenes.

Acceptance Criteria

• Mouse movement, click, and scroll events are captured.

• Custom bindings supported.

• Works with all supported window managers.

Definition of Done

• Mouse input plugin implemented and integrated.

• Position, click, and scroll events handled.

• Configurable bindings.

• Works with X11 and GLFW.