init basic database folder structure

public/migration/README.md

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+# Running Migrator CLI
+
+- Generate a new migration file
+
+    ```sh
+    cargo run -- generate MIGRATION_NAME
+    ```
+
+- Apply all pending migrations
+
+    ```sh
+    cargo run
+    ```
+
+    ```sh
+    cargo run -- up
+    ```
+
+- Apply first 10 pending migrations
+
+    ```sh
+    cargo run -- up -n 10
+    ```
+
+- Rollback last applied migrations
+
+    ```sh
+    cargo run -- down
+    ```
+
+- Rollback last 10 applied migrations
+
+    ```sh
+    cargo run -- down -n 10
+    ```
+
+- Drop all tables from the database, then reapply all migrations
+
+    ```sh
+    cargo run -- fresh
+    ```
+
+- Rollback all applied migrations, then reapply all migrations
+
+    ```sh
+    cargo run -- refresh
+    ```
+
+- Rollback all applied migrations
+
+    ```sh
+    cargo run -- reset
+    ```
+
+- Check the status of all migrations
+
+    ```sh
+    cargo run -- status
+    ```