feat: add Rust userspace support; fix TLS layout for p_align < 16; kill whole process on sibling-thread faults

programs/src/shell/exec.cpp

@@ -39,7 +39,7 @@ static void print_exit_code(const int exitCode) {
         montauk::print(c);
     }
     
-    if (exitCode > 0 && exitCode <= 14) { // 0-14 - current range of status codes within StatusCodes enum
+    if (exitCode > 0 && exitCode <= montauk::MaxStatusCode) {
         const char* statusText = montauk::GetStatusText((montauk::StatusCode)exitCode);
         
         if (statusText != nullptr) {