Add Gajim to default packages and new Prefect variable

- Add `pkgs.gajim` to the list of default packages in `default.nix`
- Introduce a new Prefect variable `wdpa_dir` in `baseddata-worker.nix`
- Set the value of `wdpa_dir` to `/media/baseddata-data/wdpa

home/common/optional/desktop/common/default.nix

@@ -29,5 +29,6 @@
     pkgs.krita
     pkgs.R
     pkgs.gimp
+    pkgs.gajim
   ];
 }

hosts/common/optional/nixos-containers/baseddata-worker.nix

@@ -234,6 +234,7 @@ in {
             .venv/bin/prefect variable set "bitcoind_port" ${bitcoindPort} --overwrite
 
             .venv/bin/prefect variable set "osm_dir" "/media/baseddata-data/osm" --overwrite
+            .venv/bin/prefect variable set "wdpa_dir" "/media/baseddata-data/wdpa" --overwrite
             .venv/bin/prefect variable set "mongo_db_name" "baseddata"  --overwrite
             .venv/bin/prefect variable set "postgres_dbname" "baseddata" --overwrite
             .venv/bin/prefect variable set "postgres_schema" "models_final" --overwrite