[users] Expand schema to support the keys documented in users.conf

- Now the documentation in the file and the source is leading
  to update the schema, but in future those should go hand-in-hand

src/modules/users/users.schema.yaml

@@ -4,14 +4,34 @@ $id: https://calamares.io/schemas/users
 additionalProperties: false
 type: object
 properties:
+    # User shell, should be path to /bin/sh or so
+    userShell: { type: string }
+    # Group settings
     defaultGroups:
         type: array
         items: { type: string }
     autologinGroup: { type: string }
-    doAutologin: { type: boolean, default: true }
     sudoersGroup: { type: string }
+    # Skip login (depends on displaymanager support)
+    doAutologin: { type: boolean, default: true }
+    # Root password separate from user password?
     setRootPassword: { type: boolean, default: true }
     doReusePassword: { type: boolean, default: true }
+    # Passwords that don't pass a quality test
+    allowWeakPasswords: { type: boolean, default: false }
+    allowWeakPasswordsDefault: { type: boolean, default: false }
+    passwordRequirements:
+        additionalProperties: false
+        type: object
+        properties:
+            nonempty: { type: boolean, default: true }
+            minLength: { type: number }
+            maxLength: { type: number }
+            libpwquality: { type: array, items: { type: string } }  # Don't know what libpwquality supports
+    # Hostname setting
+    setHostname: { type: string, enum: [ None, EtcFile, Hostnamed ] }
+    writeHostsFile: { type: boolean, default: true }
+
 required:
     - defaultGroups
     - autologinGroup