Use Str8 instead of const char * in termcolour functions

src/os/shell/termcolour/win/termcolour_win.c

@@ -1,5 +1,6 @@
 #include "aliases.h"
 #include "platform.h"
+#include "str8.h"
 
 #ifdef WAPP_PLATFORM_WINDOWS
 
@@ -40,7 +41,7 @@ internal WORD colours[COUNT_TERM_COLOUR] = {
     [WAPP_TERM_COLOUR_FG_BR_WHITE]   = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY,
 };
 
-void print_coloured_text(const char *text, TerminalColour colour) {
+void print_coloured_text(Str8RO *text, TerminalColour colour) {
   persistent TermcolourData data = {0};
   if (data.handle == 0) {
     init_data(&data);
@@ -53,7 +54,7 @@ void print_coloured_text(const char *text, TerminalColour colour) {
   }
 
   SetConsoleTextAttribute(data.handle, data.current_colour);
-  printf("%s", text);
+  printf(WAPP_STR8_SPEC, wapp_str8_varg(text));
 }
 
 internal void init_data(TermcolourData *data) {