feat: create sql migrations and apply them

- CreateSQLMigrations() writes up- and down- SQL to migration files in the migrations directory
- Migrate() generates migration files and applies them, creating a corresponding entry in the database
- Run() is deprecated. It was decided that AutoMigrator will not support in-place migrations for now
- no-op operations produce a comment in the down files if the an operation is not reversible

internal/dbtest/inspect_test.go

@@ -75,7 +75,7 @@ func TestDatabaseInspector_Inspect(t *testing.T) {
 	testEachDB(t, func(t *testing.T, dbName string, db *bun.DB) {
 		db.RegisterModel((*PublisherToJournalist)(nil))
 
-		dbInspector, err := sqlschema.NewInspector(db)
+		dbInspector, err := sqlschema.NewInspector(db, migrationsTable, migrationLocksTable)
 		if err != nil {
 			t.Skip(err)
 		}