This change completes the TypedArray packed pointer implementation by:
- Renaming original TypedArray class to TypedArrayImpl
- Introducing TypedArray as a packed pointer wrapper using PackedPointer<TypedArrayImpl<T>>
- Updating all call sites to use operator-> for packed pointer access
- Removing cassert dependency and assert calls for better portability
- Adding explicit clang compiler selection in bootstrap script
This enables efficient deduplication of TimeSamples data through pointer packing
while maintaining a similar API surface.
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Co-Authored-By: Claude <noreply@anthropic.com>