Automate updates

[StarLederer]

This preset is very simple and does not implement anything unique so we can probably track preset-mini automatically.

Looking for help since I am not good at automation.

Tasklist:

• UnoCSS releases are detected.
• Dependencies are bumped and match latest UnoCSS.
• Version is changed to match UnoCSS.
• A test is executed to confirm preset can be used without errors (should probably ask UnoCSS team how to do this best).
• New version is published to NPM automatically.

[StarLederer]

@eshimischi If you are interested in trying, i think you can go to the UnoCSS repo for reference, they have an extensive integration suite might help. The tests and examples dirs should be especially useful.

To safely deligate the update task to CI we should be sure that the plugin still still works with at least Vite every time and produces expected CSS.