This pull request introduces a new example application for demonstrating input handling using the engine, along with its build configuration. The changes include a new main.cpp that sets up keyboard and joystick input events, and a corresponding xmake.lua build script specifying dependencies and build options.

New Example Application:

• Added examples/input_usage/src/main.cpp to showcase input handling, including keyboard callbacks and joystick axis/button event printing. The example uses the engine's plugin and resource system for input management.

Build Configuration:

• Added examples/input_usage/xmake.lua to define the build process for the example, listing required packages (such as glm, glfw, spdlog, etc.), setting project properties, and configuring build modes for debug and release.

Summary by CodeRabbit

Release Notes

• New Features
  • Added example application demonstrating input handling for keyboard and joystick/controller devices
  • Logs key press and release events with human-readable key names
  • Tracks joystick axes and button state changes with threshold-based event reporting
  • Illustrates proper engine initialization and plugin integration patterns