Chore: move mk_wcwidch to 3rdparty folder

CMakeLists.txt

@@ -601,7 +601,7 @@ endif()
 include(CheckFunctionExists)
 check_function_exists(wcwidth HAVE_WCWIDTH)
 if(NOT HAVE_WCWIDTH)
-    list(APPEND LIBFASTFETCH_SRC src/util/wcwidth.c)
+    list(APPEND LIBFASTFETCH_SRC src/3rdparty/mk_wcwidch/wcwidth.c)
 endif()
 
 add_library(libfastfetch OBJECT

src/3rdparty/mk_wcwidch/repo.json

@@ -0,0 +1,7 @@
+{
+    "home": "https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c",
+    "license": "Embed in source",
+    "version": "2007-05-26 (Unicode 5.0)",
+    "author": "Markus Kuhn",
+    "modified": "CarterLi"
+}