Refactor configuration to be more modular.

TODO: Update the documentation in the README to reflect changes

modules/packages/tmux.nix

@@ -0,0 +1,16 @@
+{ ... }: 
+
+{
+  # TODO: Port changes over from dots and streamline workflow
+  programs.tmux = {
+    enable = true;
+    prefix = "C-Space";
+    customPaneNavigationAndResize = true;
+    baseIndex = 1;
+    extraConfig = ''
+      bind v split-window -v
+      bind c split-window -h
+      bind n new-window
+    '';
+  };
+}