feat: move opkssh and warpgate into plugins (C3)

plugins/opkssh/migrations/mysql/0001_adopt_opkssh_tokens.sql

@@ -0,0 +1,20 @@
+-- opkssh 0001: adopt_opkssh_tokens
+-- Generated by termix-plugin migrations. Review before committing.
+
+CREATE TABLE IF NOT EXISTS `opkssh_tokens` (
+  `id` int AUTO_INCREMENT PRIMARY KEY,
+  `user_id` varchar(255) NOT NULL,
+  `host_id` int NOT NULL,
+  `ssh_cert` text NOT NULL,
+  `private_key` text NOT NULL,
+  `email` text,
+  `sub` text,
+  `issuer` text,
+  `audience` text,
+  `created_at` text NOT NULL DEFAULT (CURRENT_TIMESTAMP),
+  `expires_at` varchar(255) NOT NULL,
+  `last_used` text,
+  FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
+  FOREIGN KEY (`host_id`) REFERENCES `ssh_data` (`id`) ON DELETE CASCADE
+);
+RENAME TABLE `opkssh_tokens` TO `p_opkssh_tokens`;