Implement domain and endpoint modules with capability management, message passing, and scheduling features

crates/domain/src/fault.rs

@@ -0,0 +1,10 @@
+use types::{address::VirtualAddress, bounded::CapSlot, permission::Permission};
+
+pub enum Fault {
+    CapabilityViolation { slot: CapSlot, needed: Permission },
+    InvalidCapability { slot: CapSlot },
+    RevokedCapability { slot: CapSlot },
+    InvalidSyscall,
+    MemoryFault { address: VirtualAddress },
+    IllegalInstruction,
+}