docs: update superuser command

docs/administrator/installation/debian.md

@@ -266,7 +266,7 @@ You can create several superusers.
 To start using Funkwhale, you need to create a superuser for your pod. This user has all the permissions needed to administrate the pod. Follow these steps to create a superuser.
 
 ```{code-block} sh
-sudo -u funkwhale venv/bin/funkwhale-manage createsuperuser
+sudo -u funkwhale venv/bin/funkwhale-manage fw users create --superuser
 ```
 
 That's it! You can log in as this user when you finish setting up Funkwhale.

docs/administrator/installation/docker.md

@@ -154,7 +154,7 @@ Once you've filled in your environment file, you can set up Funkwhale. Follow th
 4. Create your superuser.
 
    ```{code-block} sh
-   sudo docker compose run --rm api funkwhale-manage createsuperuser
+   sudo docker compose run --rm api funkwhale-manage fw users create --superuser
    ```
 
 5. Launch all the containers to bring up your pod.

docs/developer/setup/docker.md

@@ -84,7 +84,7 @@ You need to create some local data to mimic a production environment.
 1. Create a superuser so you can log in to your local app:
 
    ```sh
-   sudo docker compose -f dev.yml run --rm api funkwhale-manage createsuperuser
+   sudo docker compose -f dev.yml run --rm api funkwhale-manage fw users create --superuser
    ```
 
 2. Add some fake data to populate the database. The following command creates 25 artists with random albums, tracks, and metadata.
@@ -187,7 +187,7 @@ To run a reverse proxy for your app:
    export COMPOSE_PROJECT_NAME=node2
    export VUE_PORT=1234  # this has to be unique for each instance
    sudo docker compose -f dev.yml run --rm api funkwhale-manage migrate
-   sudo docker compose -f dev.yml run --rm api funkwhale-manage createsuperuser
+   sudo docker compose -f dev.yml run --rm api funkwhale-manage fw users create --superuser
    sudo docker compose -f dev.yml up nginx api front nginx api celeryworker
    ```