chore: reorganize select parts of codebase

src/lib.rs

@@ -1,18 +1,13 @@
-pub use cpu::Cpu as LR35902;
 pub use gui::Egui;
 pub use instruction::Cycle;
-pub use joypad::handle_gamepad_input;
-
-#[cfg(feature = "debug")]
-pub use cpu::RegisterPair;
 
 pub const GB_WIDTH: usize = 160;
 pub const GB_HEIGHT: usize = 144;
-pub const LR35902_CLOCK_SPEED: u32 = 0x400000; // Hz | 4.194304Mhz
 
 mod bus;
 mod cartridge;
 mod cpu;
+pub mod emu;
 mod gui;
 mod high_ram;
 mod instruction;