Support big-endian HDF5 and NetCDF3 files

[maxrjones]

Endiannes is indicated by specifying the 'endian' configuration of the ArrayBytesCodec named Bytes. This works on already released Zarr versions.

• Closes #xxxx
• Tests added
• Tests passing
• Full type hint coverage
• Changes are documented in docs/releases.rst
• New functions/methods are listed in api.rst
• New functionality has documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.44%. Comparing base (62ca069) to head (81200ba).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #640      +/-   ##
===========================================
+ Coverage    88.20%   88.44%   +0.23%     
===========================================
  Files           34       34              
  Lines         1789     1791       +2     
===========================================
+ Hits          1578     1584       +6     
+ Misses         211      207       -4     

Files with missing lines	Coverage Δ
virtualizarr/codecs.py	97.95% <100.00%> (+0.08%)	⬆️
virtualizarr/manifests/utils.py	91.07% <ø> (ø)

... and 2 files with indirect coverage changes

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[TomNicholas]

Amazing!!! Let's add a release note and get this in.

[TomNicholas]

(Note to readers: this means that we can release VirtualiZarr against existing versions of Zarr! #618 is only needed once zarr issues a release that includes those data types changes.)

[norlandrhagen]

Super cool @maxrjones! Am I remembering correctly that this unblocks NetCDF3?

[maxrjones]

Super cool @maxrjones! Am I remembering correctly that this unblocks NetCDF3?

yep, I think so.

[maxrjones]

darn I forgot release notes! We really need that towncrier bot.