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/apps/memtop/memtop.c

@@ -30,8 +30,8 @@ int main(void) {
     char metricsBuf[128];
 
     while (true) {
-        if (SysGetConsoleInfo(&console) == STATUS_SUCCESS &&
-            SysGetMemoryStatus(&mem) == STATUS_SUCCESS) {
+        if (SysGetConsoleInfo(&console) == NTLSTATUS_SUCCESS &&
+            SysGetMemoryStatus(&mem) == NTLSTATUS_SUCCESS) {
 
             // If the system isn't reporting columns correctly, default to a safe standard width
             int columns = (console.Columns > 0) ? (int)console.Columns : 80;