fix: full init boot logic works — CreateProcess no longer spawns threads, boot uses out-param to avoid sret bug

- CreateProcess only creates process + grants cap, no thread spawning
- boot::boot takes &mut BootResult instead of returning it (fixes -> ! sret convention issue)
- Init creates 6 server processes, sets up supervisor, enters receive loop
- No faults on QEMU with full boot sequence

crates/init/src/lib.rs

@@ -7,6 +7,12 @@ pub mod shutdown;
 pub mod supervisor;
 
 pub fn run() -> ! {
-    // Phase 1: just prove we can run from disk and exit cleanly
-    userspace::syscall::exit();
+    let create_cap = types::bounded::CapSlot::new(0)
+        .unwrap_or_else(|| unreachable!());
+
+    let mut result = boot::BootResult::empty();
+    boot::boot(&manifest::SNAKE_MANIFEST, create_cap, &mut result);
+
+    let mut sup = boot::create_supervisor(&manifest::SNAKE_MANIFEST, &result);
+    sup.run(create_cap);
 }