String safety (#1548)

* Array size UB fixes

* Fix ShieldD

* Remove (almost) all unsafe strcpy calls

Bunch of macros. C arrays are easy enough and just need a different call. For various cases where a char* is passed around bare, I've made a TEXT_SPAN macro that can store a length too for bounds checking.

* Move crash handling in safe string operations to separate TU

* strcat safe version

* sprintf made safe too

* Fix compile

libs/JSystem/src/JKernel/JKRFileCache.cpp

@@ -8,6 +8,7 @@
 
 #include <cctype>
 #include <cstring>
+#include "dusk/string.hpp"
 #include "global.h"
 
 JKRFileCache* JKRFileCache::mount(const char* path, JKRHeap* heap, const char* param_3) {