move bitwarden_rs docs to vaultwarden

docs/vaultwarden.md

@@ -0,0 +1,18 @@
+# Required variables
+These variables are required. Example values included. Some general variables might also be required for this role.
+
+```
+ports:
+  vaultwarden_http: 8080
+  vaultwarden_websocket: 3012
+
+vaultwarden_external_url: 'https://vaultwarden.domain.tld'
+```
+
+These variables should be encrypted using ansible vault
+
+```
+vaultwarden_admin_pw: 'rcWJYfkSZcqzV74B8Y7qtWzB7DYozH5xwXrochZZMwkvrNMBTzEKbN5tj3wjyzu6X'
+vaultwarden_postgres_pw: 'oefnh937f87nh9efm3ew0f8390g8nh0tm80d87n07nh4nfrfgiugingnuogme'
+```
+