feat(storage-fs): adapt to the new storage option and rename the package

packages/storage-fs/README.md

@@ -0,0 +1,30 @@
+# @emigrate/storage-fs
+
+A file system storage plugin for Emigrate, suitable for simple migration setups. To support containerized environments, it is recommended to use a database storage plugin instead.
+
+## Installation
+
+Install the storage plugin in your project, alongside the Emigrate CLI:
+
+```bash
+npm install --save-dev @emigrate/cli @emigrate/storage-fs
+```
+
+## Usage
+
+Configure the storage in your `emigrate.config.js` file:
+
+```js
+import storageFs from '@emigrate/storage-fs';
+
+export default {
+  directory: 'migrations',
+  storage: storageFs({ filename: '.migrated.json' }),
+};
+```
+
+Or use the CLI option `--storage` (or `-s`):
+
+```bash
+emigrate up --storage fs  # the @emigrate/storage- prefix is optional
+```