[Feature Request] Bookmark Keywords

I love the bookmark 'Keyword' feature in Firefox and I think it would be an awesome addition to Ladybird. Using a split keyboard without dedicated arrow keys, I find this to be much more ergonomic solution. I've included a screenshot of it being used and the field when editing a bookmark: <img width="358" height="110" alt="Image" src="https://github.com/user-attachments/assets/17cb0be7-e34e-4647-b155-93bc1f490faa" /> <img width="485" height="418" alt="Image" src="https://github.com/user-attachments/assets/1d2f6899-ba2c-4185-978d-47390fbd5e11" /> Thanks for all your hard work!