Working on the UX

Hi again!

So, multiple things included in the last update. Let's enumerate:

- Added a confirmation modal for data reset. No more missclicking leading to data loss.

- Moved the edit section to the right column and use a toggle button to switch between display and edit. I think is better this way?

- Now files are downloaded with the name of your root page.

- Now actions are in their own menu, which appears on hover!

- Small animation in the cards to make the appear/disappear more pleasently.

This is it for now. I have not added the dark mode (out of lazyness, to be fair). I have started the data tree issue, but I am not motivated enough to find a visualization that I like (a node-like graph).

Regarding the search bar, I am not sure if this might be an usefull feature, so far I am not needing it, the notes column is enough for me.

Last, the modify the text live, not something straight forward to achieve. Not sure the correct strategy to do it. I am relatively happy with the experience now, so I am not going to put hours into this.

Comments are always welcome!

Jose