[all] Rename kernel::args to kernel::init

The kernel::args namespace is really the protocol for initializing the
kernel from the bootloader. Also, the header struct in that namespace
isn't actually a header, but a collection of parameters. This change
renames the namespace to kernel::init and the struct to args.

src/boot/console.h

@@ -14,7 +14,7 @@ namespace boot {
 class console
 {
 public:
-	using framebuffer = kernel::args::framebuffer;
+	using framebuffer = kernel::init::framebuffer;
 
 	console(uefi::boot_services *bs, uefi::protos::simple_text_output *out);