feat: docs about minify()

docs/dev/readme.md

@@ -0,0 +1,15 @@
+# Development Helpers
+
+## Automatic Asset Minification
+
+Frontend bundlers can be complex and time-consuming. That's why I prefer to use RockMigrations for this task.
+
+Let's consider a scenario where you're developing a new module and you want to include some JavaScript. Assume the JavaScript file is located at /site/modules/MyModule/myscript.js
+
+```php
+// In an autoload module, you can place this in the init() method
+$rm = rockmigrations();
+$rm->minify("/path/to/MyModule/myscript.js");
+```
+
+This action will produce a compressed version of the file, named myscript.min.js, which can be loaded wherever required. You can continue developing within myscript.js and a compressed version will be regenerated on every page load - but only if the file has been modified and only if you are a superuser, to avoid unnecessary overhead in production.