Add DMS plugins for rbw lock and wvkbd toggle

- Introduced new DMS plugins: `rbw-lock-toggle` for managing Bitwarden vault state and `wvkbd-toggle` for showing/hiding the on-screen keyboard.
- Updated `flake.lock` and `flake.nix` to include the new plugins and their configurations.
- Removed legacy options and files related to the rbw lock toggle, streamlining the DMS configuration.
- Enhanced the home-manager module to support the new plugins and their integration into the DMS environment.

modules/hosts/ideapad/configuration.nix

@@ -90,8 +90,6 @@
         defaultSession = "niri";
         shell = "dms";
         shells.dms = {
-          enableWvkbdToggle = true;
-          enableRbwLockToggle = true;
           # Cross-build on the 14900k via binfmt and push back over LAN — much faster than
           # rebuilding aarch64 closure on the Snapdragon. Mirrors the old NixOS-New flow:
           # ssh out to nixdesk, run nixos-rebuild --target-host pointing back at us.