abort/error: print backtrace, abuse templates, overhaul result/diag (macos not done yet)

exosphere/program/rebootstub/source/rebootstub_power_off.cpp

@@ -50,7 +50,7 @@ namespace ams::rebootstub {
 
 namespace ams::diag {
 
-    void AbortImpl() {
+    NORETURN void AbortImpl() {
         /* Halt the bpmp. */
         rebootstub::Halt();
 

exosphere/program/sc7fw/source/sc7fw_main.cpp

@@ -111,7 +111,7 @@ namespace ams::sc7fw {
 
 namespace ams::diag {
 
-    void AbortImpl() {
+    NORETURN void AbortImpl() {
         sc7fw::ExceptionHandler();
     }
 

exosphere/program/source/secmon_error.cpp

@@ -50,7 +50,7 @@ namespace ams::diag {
 
     }
 
-    void AbortImpl() {
+    NORETURN void AbortImpl() {
         /* Perform any necessary (typically none) debugging. */
         if constexpr (SaveSystemStateForDebug) {
             SaveSystemStateForDebugAbort();