Separator: uses widecharwidth for Unicode wcwidth and fixes issue that wchar_t on Windows is 2-byte length

Author: CarterLi

CMakeLists.txt

@@ -1304,7 +1304,7 @@ endif()
 include(CheckFunctionExists)
 check_function_exists(wcwidth HAVE_WCWIDTH)
 if(NOT HAVE_WCWIDTH)
-    list(APPEND LIBFASTFETCH_SRC src/3rdparty/mk_wcwidch/wcwidth.c)
+    list(APPEND LIBFASTFETCH_SRC src/util/wcwidth.c)
 endif()
 if(LINUX)
     check_function_exists(statx HAVE_STATX)

src/3rdparty/mk_wcwidch/repo.json

@@ -0,0 +1,6 @@
+{
+    "home": "https://github.com/ridiculousfish/widecharwidth",
+    "license": "Public domain",
+    "version": "Unicode 16",
+    "author": "ridiculousfish"
+}