Add AnyInBoundsAndUpdate

🚀 Changes proposed by this PR

AnyInBounds discards the results of Update(). This makes it useless for value-based models, and doesn't let us use it to trigger tea.Cmds.

This PR adds AnyInBoundsAndUpdate (I'm not tied to the name); which doesn't discard the results of Update(), instead carrying updates to the model through the events, and returning the final tea.Model and resulting tea.Cmds.

I also refactored a bit to share the logic between these two functions, and changed said factored-out code to reduce allocations a bit.

🧰 Type of change

[x] New feature (non-breaking change which adds functionality).

🤝 Requirements

[x] ✍ I have read and agree to this projects Code of Conduct.
[x] ✍ I have read and agree to this projects Contribution Guidelines.
[x] ✍ I have read and agree to the Developer Certificate of Origin.
[x] 🔎 I have performed a self-review of my own changes.
[x] 🎨 My changes follow the style guidelines of this project.
[x] 💬 My changes as properly commented, primarily for hard-to-understand areas.
[x] 📝 I have made corresponding changes to the documentation.
[x] 🧪 I have included tests (if necessary) for this change.

lrstanley / bubblezone