[UI/UX][QOL] Add number of eggs hatching to egg skip prompt

[Fontbane]

What are the changes the user will see?

• If the egg skip option is set to "Ask", the prompt will say how many eggs are about to hatch

Why am I making these changes?

• Small QoL
• The user might decide differently if they know only 6 eggs are hatching rather than 20

What are the changes from a developer perspective?

• This PR simply passes the eggsToHatchCount variable from EggLapsePhase as an argument when the eggSkipPrompt locale entry is called, as eggsToHatch

Screenshots/Videos

How to test the changes?

• Add {{eggsToHatch}} somewhere in the eggSkipPrompt entry in a battle.json translation file, or check out the linked translation PR

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I considered writing automated tests for the issue?
• If I have text, did I make it translatable and add a key in the English locale file(s)?
  • Implemented in PR-locale PR#56
• Have I tested the changes (manually)?
  • Are all unit tests still passing? (npm run test)
• Are the changes visual?
  • Have I provided screenshots/videos of the changes?