feat: convert tmux monitoring into a plugin (B10)

plugins/tmux-monitor/migrations/mysql/0001_adopt_tmux_session_tags.sql

@@ -0,0 +1,14 @@
+-- tmux-monitor 0001: adopt_tmux_session_tags
+-- Generated by termix-plugin migrations. Review before committing.
+
+CREATE TABLE IF NOT EXISTS `tmux_session_tags` (
+  `id` int AUTO_INCREMENT PRIMARY KEY,
+  `user_id` varchar(255) NOT NULL,
+  `host_id` int NOT NULL,
+  `session_name` text NOT NULL,
+  `tag` text NOT NULL,
+  `created_at` text NOT NULL DEFAULT (CURRENT_TIMESTAMP),
+  FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE,
+  FOREIGN KEY (`host_id`) REFERENCES `ssh_data` (`id`) ON DELETE CASCADE
+);
+RENAME TABLE `tmux_session_tags` TO `p_tmux_monitor_session_tags`;