Create a cargo workspace with a new blog_os crate at the root

kernel/src/main.rs

@@ -0,0 +1,16 @@
+#![no_std]
+#![no_main]
+
+use core::panic::PanicInfo;
+
+bootloader_api::entry_point!(kernel_main);
+
+fn kernel_main(bootinfo: &'static mut bootloader_api::BootInfo) -> ! {
+    loop {}
+}
+
+/// This function is called on panic.
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}