Add GTK config

With these settings, the cursor looks exceptionally well even with
HiDPI. Adapta is used over other GTK themes since Adapta has very good
padding defaults. Adapta also won't cause problems with input fields,
compared to several other GTK themes.

.config/gtk-3.0/settings.ini

@@ -0,0 +1,33 @@
+# New Start: A modern Arch workflow built with an emphasis on functionality.
+# Copyright (C) 2018 Donovan Glover
+#
+# https://developer.gnome.org/gtk3/stable/GtkSettings.html
+
+[Settings]
+
+# ===========================
+# ========== theme ==========
+# ===========================
+
+gtk-theme-name        = Adapta
+gtk-icon-theme-name   = Papirus-Adapta
+
+# ============================
+# ========== cursor ==========
+# ============================
+
+# Use the same cursor as KDE
+gtk-cursor-theme-name = breeze_cursors
+
+# Use a large cursor size for HiDPI
+gtk-cursor-theme-size = 36
+
+# ==========================
+# ========== font ==========
+# ==========================
+
+gtk-font-name         = Cantarell Regular 10
+gtk-xft-hinting       = 1
+gtk-xft-antialias     = 1
+gtk-xft-hintstyle     = hintfull
+gtk-xft-rgba          = rgb