[WIP] Android asset consolidation

[brocollie08]

AsyncHydrationTrackerPlugin now works with both XML and Compose assets

• Single source of truth for if the asset tree is done rendering — onHydrationStarted / onHydrationComplete hooks fire across the entire tree, including ComposableAsset children.
• Each asset's render lifecycle handles renewing the hydrationScope on rehydrate and cancelled on re-render.

SuspendableAsset and DecodableAsset collapsed into RenderableAsset

• SuspendableAsset is deprecated; its async/suspending render API is now built into the base RenderableAsset class.
• DecodableAsset is also deprecated in favor of RenderableAsset — typed decoding from the asset node is part of the base class via the constructor's serializer.
• One base class for all asset implementations regardless of sync/async or XML/Compose. ComposableAsset is the only specialization that remains, and it extends RenderableAsset directly.

💥 Breaking — RenderableAsset API 💥

• hydrate is now non-suspending: fun CoroutineScope.hydrate(view: View, data: Data).
• initView(data: Data) replaces the old no-arg initView(); runs on Dispatchers.Default.
• Direct val data property access is removed; use suspend fun getData().
• Child rendering: replace the old child.render(parent.requireContext(), styles) extension family with inflate(child, container, styles). The new API handles render tracker registration, hydration scoping, and view insertion in one call.
• AnyAsset is now a typealias for RenderableAsset<*> and can be used to declare data types that are expected to be assets.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (d09c972) to head (c2dc0ae).

Additional details and impacted files

@@           Coverage Diff            @@
##   player-1-dot-zero   #861   +/-   ##
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