Add Metadata and use FileMultiSelectDropdown in every blocks

[BenjaminCharmes]

Related to issue #1016 and another version of PR #1035

Add metadata visualisation and FileMultiSelectDropdown to all blocks

[codecov]

Codecov Report

❌ Patch coverage is 28.57143% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.76%. Comparing base (4243930) to head (6e68f8c).

Files with missing lines	Patch %	Lines
pydatalab/src/pydatalab/apps/nmr/blocks.py	31.25%	22 Missing ⚠️
pydatalab/src/pydatalab/apps/xrd/blocks.py	25.00%	18 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1436      +/-   ##
==========================================
- Coverage   79.34%   78.76%   -0.59%     
==========================================
  Files          70       70              
  Lines        5099     5148      +49     
==========================================
+ Hits         4046     4055       +9     
- Misses       1053     1093      +40     

Files with missing lines	Coverage Δ
pydatalab/src/pydatalab/apps/xrd/blocks.py	82.43% <25.00%> (-7.84%)	⬇️
pydatalab/src/pydatalab/apps/nmr/blocks.py	76.66% <31.25%> (-10.09%)	⬇️

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[cypress]

datalab    Run #4271

Run Properties:   Passed #4271  •  d6a85920d0 ℹ️: Merge 6e68f8ce601be1d456e46b5d6684ca3c386a187e into 42439305edbc49d0278b0d992815...

Project	datalab
Branch Review	bc/datablock-upgrade
Run status	Passed #4271
Run duration	09m 38s
Commit	d6a85920d0 ℹ️: Merge 6e68f8ce601be1d456e46b5d6684ca3c386a187e into 42439305edbc49d0278b0d992815...
Committer	Ben Charmes
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	456
View all changes introduced in this branch ↗︎