Refactor: move title detection to own header

src/detection/title.c

@@ -1,4 +1,5 @@
 #include "fastfetch.h"
+#include "detection/title.h"
 
 #include <limits.h>
 #include <unistd.h>

src/detection/title.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#ifndef FF_INCLUDED_detection_title
+#define FF_INCLUDED_detection_title
+
+#include "util/FFstrbuf.h"
+
+typedef struct FFTitleResult
+{
+    FFstrbuf userName;
+    FFstrbuf hostname;
+    FFstrbuf fqdn; //Fully qualified domain name
+} FFTitleResult;
+
+const FFTitleResult* ffDetectTitle(const FFinstance* instance);
+
+#endif