refactor: simplify keyboard module

modules/keyboard/default.nix

@@ -1,13 +1,16 @@
 { pkgs, ... }:
 
+with pkgs;
+let
+  tools = interception-tools;
+  caps2esc = interception-tools-plugins.caps2esc;
+in
 {
   services.interception-tools = {
     enable = true;
-    plugins = [
-      pkgs.interception-tools-plugins.caps2esc
-    ];
+    plugins = [ caps2esc ];
     udevmonConfig = ''
-      - JOB: ${pkgs.interception-tools}/bin/intercept -g $DEVNODE | ${pkgs.interception-tools-plugins.caps2esc}/bin/caps2esc -m 1 | ${pkgs.interception-tools}/bin/uinput -d $DEVNODE
+      - JOB: ${tools}/bin/intercept -g $DEVNODE | ${caps2esc}/bin/caps2esc -m 1 | ${tools}/bin/uinput -d $DEVNODE
         DEVICE:
           EVENTS:
             EV_KEY: [KEY_CAPSLOCK]