implement user mode catchable exceptions, refactor system status codes to use NTLSTATUS_ prefix, update build scripts to use shared literal macros for linker arguments, update named queue lifetime cleanup to include KeNamedQueueUnpublishHandle.

code/user/personalities/posix/posix_io.c

@@ -15,7 +15,7 @@ __declspec(dllexport) void clearscreen(void) {
 // Implements the clearkeyboard operation.
 __declspec(dllexport) void clearkeyboard(void) {
     INPUT_KEY key;
-    while (SysPollKeyboard(&key) == STATUS_SUCCESS) {
+    while (SysPollKeyboard(&key) == NTLSTATUS_SUCCESS) {
         char ignored;
         (void)SysReadKeyboardChar(&ignored);
     }
@@ -90,7 +90,7 @@ __declspec(dllexport) ssize_t read(int fd, void* buf, size_t count) {
             char* dst = (char*)buf;
             for (size_t i = 0; i < count; i++) {
                 uint32_t s = SysReadKeyboardChar(&dst[i]);
-                if (s != STATUS_SUCCESS) { errno = PosixStatusToErrno(s); return -1; }
+                if (s != NTLSTATUS_SUCCESS) { errno = PosixStatusToErrno(s); return -1; }
                 if (dst[i] == '\n' || dst[i] == '\r') return (ssize_t)(i + 1);
             }
             return (ssize_t)count;