feat: convert tmux monitoring into a plugin (B10)

plugins/tmux-monitor/migrations/sqlite/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" integer PRIMARY KEY AUTOINCREMENT,
+  "user_id" text NOT NULL,
+  "host_id" integer 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
+);
+ALTER TABLE "tmux_session_tags" RENAME TO "p_tmux_monitor_session_tags";