Dev updates

[connormanning]

Plenty of updates, some of them resulting from downstream usage, for example in the COPC/EPT viewer. Some highlights:

• Remove hierarchy caching layer, instead exposing simpler utilities to let the downstream user control any caching
• Genericize the hierarchy types to be compatible with EPT hierarchy types
• Expose more granular utilities so that the user may control the various steps in data processing e.g. loadCompressedPointDataBuffer, loadPointDataBuffer, and loadPointDataView
• LAS 1.2 support as well as the existing 1.4 support in the Las module, which is helpful for EPT
• Allow the user to optionally pass their own laz-perf instance to decompression methods
• Remove bundled laz-perf code and use the upstream npm package instead
• Extra bytes support (although this is relatively untested in lieu of a COPC file that actually contains them)