implement user handling for trips

rust/migrations/20230820194457_add_user_to_trips2.sql

@@ -0,0 +1,21 @@
+CREATE TABLE "trips_tmp" (
+    id VARCHAR(36) NOT NULL,
+    name TEXT NOT NULL,
+    date_start DATE NOT NULL,
+    date_end DATE NOT NULL,
+    location TEXT,
+    state VARCHAR(8) NOT NULL,
+    comment TEXT,
+    temp_min INTEGER,
+    temp_max INTEGER,
+    user_id VARCHAR(36) NOT NULL,
+    PRIMARY KEY (id),
+    UNIQUE (name),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+INSERT INTO trips_tmp SELECT *, (SELECT id FROM users LIMIT 1) as user_id FROM trips;
+
+DROP TABLE trips;
+
+ALTER TABLE trips_tmp RENAME TO trips;