Introduction of stable Compose UI State and some simple animations in Debug Panel

[jsoberg]

Hey all!

This PR introduces stable UI state in the debug panel, as well as some simple animations.

Using the debug panel screen as a starting point, this PR adds the conversion of the database model (MeshLog in this instance) to an explicitly stable UI state. There are more details on why this is important here, but a stable UI state allows Compose to better control recompositions/etc, and remove a direct dependency of the UI to the database.

Additionally, this introduces some simple animations to the debug panel (animated scroll/placement). The difference is subtle and doesn't come through well in video, so running on device will be a better comparison - however, here are recordings for posterity:

Before	After
MESH_BEFORE.mp4	MESH_AFTER.mp4

I'll open a discussion topic about introducing this further in the project - this is just an example. Thanks!

[CLAassistant]

All committers have signed the CLA.

[jsoberg]

Added a discussion topic about this here

[jamesarich]

I like where this is headed. We'll have to tackle this in quite a few places, I think. There are some UI models already defined that could benefit from immutability / more stable compose state.