feat: Lists enhancements

[LuchoTurtle]

With the awesome addition of #165 , it makes sense now to add some usability features that will for sure enhance the experience! Here's a small list of theoretically "fast-achieving" features we can implement.

• [ ] add information on each item (a pill, for example) regarding which list it belongs to.
• [ ] transfer items between lists.
• [ ] updating tags on existing items.

[nelsonic]

These are great enhancements. Do you want to pick one of them and implement? 🥇 (we will get to all of them. just one at a time ...)