feat(storage): full file protocol over per-client shared region (badged clients, owned handles, clamped lengths, ReadOnly on unwritable disk); init loads via libkos::fs; drop boot shared buffer

crates/init/src/main.rs

@@ -4,6 +4,6 @@
 extern crate libkos;
 
 #[unsafe(no_mangle)]
-extern "C" fn main(shared_buf: usize) {
-    init::run(shared_buf);
+extern "C" fn main() {
+    init::run();
 }