Remove implicit conversion operator from RString to const char*

This is required for the RString to std::string migration.

Mostly automated from https://github.com/aeubanks/rewriter/blob/main/c_str.cc, with some manual intervention required for fixing up `a + b.c_str()` to `(a + b).c_str()`.

Added some overloads for some common global functions like sm_crash to reduce the number of changes required here.

src/Actor.cpp

@@ -1941,7 +1941,7 @@ public:
 	static int GetHAlign( T* p, lua_State *L )	{ lua_pushnumber( L, p->GetHorizAlign() ); return 1; }
 	static int GetVAlign( T* p, lua_State *L )	{ lua_pushnumber( L, p->GetVertAlign() ); return 1; }
 
-	static int GetName( T* p, lua_State *L )		{ lua_pushstring( L, p->GetName() ); return 1; }
+	static int GetName( T* p, lua_State *L )		{ lua_pushstring( L, p->GetName().c_str() ); return 1; }
 	static int GetParent( T* p, lua_State *L )
 	{
 		Actor *pParent = p->GetParent();