chore: add some basic README files

packages/plugin-generate-js/README.md

@@ -0,0 +1,28 @@
+# @emigrate/plugin-generate-js
+
+This package contains an Emigrate plugin for generating migration files using JavaScript as a language.
+
+## Usage
+
+Install the package:
+
+```bash
+npm install --save-dev @emigrate/plugin-generate-js
+```
+
+Use the plugin with the `emigrate new` command:
+
+```bash
+emigrate new --plugin generate-js create some fancy table
+```
+
+Or add it to your `emigrate.config.js` file:
+
+```js
+import generateJs from '@emigrate/plugin-generate-js';
+
+export default {
+  directory: 'migrations',
+  plugins: [generateJs],
+};
+```