Added the functionality to insert a workout

migrations/20250708192552_add_tables.down.sql

@@ -1,8 +1,9 @@
 -- Add migration script here
 DROP TABLE exercise_categories;
-DROP TABLE exercise_muscle_groups;
+DROP TABLE exercise_muscles;
 DROP TABLE workout_exercises;
 DROP TABLE categories;
-DROP TABLE muscle_groups;
+DROP TABLE muscles;
 DROP TABLE exercises;
 DROP TABLE workouts;
+DROP TYPE exercise_variant;