feat: add visual feedbacks

we had players ask us to improve UI feedbacks when playing the game, we could:

- [x] display (or hint) a gain or loss of resources (example: =/+/++ pop) when an effect activates
- [x] display the amount of resources your are gaining/loosing each turn #89
- [ ] display results current ongoing or eternal effects ?
- [x] make an animation when a Turn is over #100
- [ ] change 'wait next cycle' look (icon ? image ?)

No files, tests, or commands are listed in the issue. First, inspect where turn progression, effect resolution, and UI rendering are implemented to map resource updates and the “wait next cycle” control. Then identify the component/state path that shows turn and feedback messages and update it to cover the remaining unchecked bullets. Done means visible feedback for turn/effect changes and the updated “wait next cycle” look are working in gameplay.

Written by the indexing model from the issue text.