refactor: split common/nixos.nix and -/home.nix

Split these big files into modular files that
are easier to share and read on their own.

profiles/common/nixos/interceptiontools.nix

@@ -0,0 +1,29 @@
+{ pkgs, ... }:
+{
+  # Make CAPS work as a dual function ESC/CTRL key
+  services.interception-tools = {
+    enable = true;
+    udevmonConfig =
+      let
+        dualFunctionKeysConfig = builtins.toFile "dual-function-keys.yaml" ''
+          TIMING:
+            TAP_MILLISEC: 200
+            DOUBLE_TAP_MILLISEC: 0
+
+          MAPPINGS:
+            - KEY: KEY_CAPSLOCK
+              TAP: KEY_ESC
+              HOLD: KEY_LEFTCTRL
+        '';
+      in
+      ''
+        - JOB: |
+            ${pkgs.interception-tools}/bin/intercept -g $DEVNODE \
+              | ${pkgs.interception-tools-plugins.dual-function-keys}/bin/dual-function-keys -c ${dualFunctionKeysConfig} \
+              | ${pkgs.interception-tools}/bin/uinput -d $DEVNODE
+          DEVICE:
+            EVENTS:
+              EV_KEY: [KEY_CAPSLOCK]
+      '';
+  };
+}