[GUI Plugin] Add year and month to custom column

[artakan]

This is a plugin I wrote for myself to solve a problem/annoyance I had, but I figured maybe someone else will want it too.

After install & Before use!:

1. Open the settings by clicking on the arrow next to the button
2. Choose the custom column where the data will be entered
3. Select English or Norwegian for the month name abbreviations. ex: en: oct, nor: okt
4. Check if you want the button to OVERWRITE the value in the field (single value), or add to it (comma-seperated)

What it does:

Add current month to custom column: When clicked it will add the current month in the format of "2026 10 oct"

Why did I make this?
I wanted a column that both can tell me when I read that book, as well as provide data for a custom column showing the most recent date for when I read it.
In order to do this I would have to open several menus to add a new date when I read a book again later. Why do this when a plugin can do it for me?
This is the result. Yes, it's VERY niche