home: Add alacritty config

Alacritty has vastly superior touch support compared to kitty, which
doesn't feature touch support at all. The simplicity of Alacritty also
makes it faster and overall cleaner to use than GNOME Console (kgx).

home/alacritty.nix

@@ -0,0 +1,15 @@
+{
+  programs.alacritty = {
+    enable = true;
+
+    settings = {
+      window = {
+        padding.x = 10;
+        padding.y = 10;
+      };
+
+      mouse.hide_when_typing = true;
+      selection.save_to_clipboard = true;
+    };
+  };
+}