chore: add some basic README files

packages/emigrate/README.md

@@ -0,0 +1,21 @@
+# emigrate
+
+Emigrate is a tool for managing database migrations. It is designed to be simple yet support advanced setups, modular and extensible.
+
+## Installation
+
+Install Emigrate in your project:
+
+```bash
+npm install --save-dev emigrate
+```
+
+## Usage
+
+Create a new migration:
+
+```bash
+emigrate new -d migrations -e .js create some fancy table
+```
+
+Will create a new empty JavaScript migration file with the name "YYYYMMDDHHmmssuuu_create_some_fancy_table.js" in the `migrations` directory.