moved IsBigEndian into it's own file

src/util/IsBigEndian.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace chatterino {
+
+bool isBigEndian()
+{
+    int test = 1;
+    char *p = reinterpret_cast<char *>(&test);
+
+    return p[0] == 0;
+}
+
+}  // namespace chatterino