refactor: Split out lz4f from lz4 + upstream to ChunkCodecs.jl

[icweaver]

Todo:

• Split out lz4f from lz4

• Simplify with a TBD codec upstreaming our hand-rolled decode_Lz4 and friends to ChunkCodecLibLz4.jl, addresses the following TODO

  ASDF.jl/src/ASDF.jl

  Lines 286 to 290 in 7fcfb77

  	elseif compression == C_Lz4
  	# TODO: Once an `LZ4ASDFCodec` is upstreamed to ChunkCodecs.jl,
  	# this could be added to the uniform codec branches below.
  	# https://github.com/JuliaAstro/ASDF.jl/issues/72
  	data = decode_Lz4(data, Int(header.data_size))

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (cfbde37) to head (039fac6).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #73   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines          589       580    -9     
=========================================
- Hits           589       580    -9     

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