Feature: Add "Authentication Method" to allow existing users to sign in with LDAP (#2143)

* adds authentication method for users

* fix db migration with postgres

* tests for auth method

* update migration ids

* hide auth method on user creation form

* (docs): Added documentation for the new authentication method

* update migration

* add  to auto-form instead of having hidden fields

frontend/composables/use-users/user-form.ts

@@ -29,6 +29,14 @@ export const useUserForm = () => {
       type: fieldTypes.PASSWORD,
       rules: ["required", "minLength:8"],
     },
+    {
+      label: "Authentication Method",
+      varName: "authMethod",
+      type: fieldTypes.SELECT,
+      hint: "This specifies how a user will authenticate with Mealie. If you're not sure, choose 'Mealie'",
+      disableCreate: true,
+      options: [{ text: "Mealie" }, { text: "LDAP" }],
+    },
     {
       section: "Permissions",
       label: "Administrator",