separate kernel lib and binary

kernel/src/cfg.rs

-const CONFIG: bootloader_api::BootloaderConfig = {
-    let mut config = bootloader_api::BootloaderConfig::new_default();
-    config.kernel_stack_size = 4096 * 4; // 16KiB
-    config
-};
-
-bootloader_api::entry_point!(super::kernel_main, config = &CONFIG);

kernel/src/main.rs

 #![no_std]
 #![no_main]
-#![feature(abi_x86_interrupt)]
 
-pub mod cfg;
-pub mod framebuffer;
-pub mod idt;
-pub mod instructions;
+const CONFIG: bootloader_api::BootloaderConfig = {
+    let mut config = bootloader_api::BootloaderConfig::new_default();
+    config.kernel_stack_size = 4096 * 4; // 16KiB
+    config
+};
 
-#[panic_handler]
-fn panic_handler(_: &core::panic::PanicInfo) -> ! {
-    instructions::hlt();
-}
-
-fn kernel_main(boot_info: &'static mut bootloader_api::BootInfo) -> ! {
-    framebuffer::init(boot_info);
-    framebuffer::clear();
-    framebuffer::print_char(b'H');
-
-    idt::init();
-
-    instructions::hlt();
-}
+bootloader_api::entry_point!(hyperion_kernel::kernel_main, config = &CONFIG);