Refactor: move qt detection to own header

src/modules/font.c

@@ -2,6 +2,7 @@
 #include "common/font.h"
 #include "common/printing.h"
 #include "common/parsing.h"
+#include "detection/qt.h"
 
 #define FF_FONT_MODULE_NAME "Font"
 #define FF_FONT_NUM_FORMAT_ARGS 21

src/modules/icons.c

@@ -1,6 +1,7 @@
 #include "fastfetch.h"
 #include "common/printing.h"
 #include "common/parsing.h"
+#include "detection/qt.h"
 
 #define FF_ICONS_MODULE_NAME "Icons"
 #define FF_ICONS_NUM_FORMAT_ARGS 5

src/modules/theme.c

@@ -1,6 +1,7 @@
 #include "fastfetch.h"
 #include "common/printing.h"
 #include "common/parsing.h"
+#include "detection/qt.h"
 
 #define FF_THEME_MODULE_NAME "Theme"
 #define FF_THEME_NUM_FORMAT_ARGS 7