feat: move sso and ldap logins into plugins (C2)

plugins/ldap/migrations/mysql/0001_create_providers.sql

@@ -0,0 +1,12 @@
+-- ldap 0001: create_providers
+-- Generated by termix-plugin migrations. Review before committing.
+
+CREATE TABLE IF NOT EXISTS `p_ldap_providers` (
+  `id` int AUTO_INCREMENT PRIMARY KEY,
+  `name` text NOT NULL,
+  `enabled` boolean NOT NULL DEFAULT true,
+  `display_order` int NOT NULL DEFAULT 0,
+  `config` text NOT NULL,
+  `created_at` text NOT NULL DEFAULT (CURRENT_TIMESTAMP),
+  `updated_at` text NOT NULL DEFAULT (CURRENT_TIMESTAMP)
+);