Implement dataset search

[Cadair]

No description provided.

[codecov]

Codecov Report

Merging #73 into master will decrease coverage by 5.19%.
The diff coverage is 96.68%.

@@            Coverage Diff             @@
##           master      #73      +/-   ##
==========================================
- Coverage   99.26%   94.07%   -5.20%     
==========================================
  Files          16       29      +13     
  Lines         679     1265     +586     
==========================================
+ Hits          674     1190     +516     
- Misses          5       75      +70     

Impacted Files	Coverage Δ
dkist/io/loaders.py	100.00% <0.00%> (ø)
dkist/utils/globus/endpoints.py	100.00% <0.00%> (ø)
dkist/extern/__init__.py
dkist/utils/__init__.py	100.00% <0.00%> (ø)
dkist/io/asdf/tags/array_container.py	100.00% <0.00%> (ø)
dkist/net/attr_walker.py	98.87% <0.00%> (ø)
dkist/io/asdf/generator/__init__.py	100.00% <0.00%> (ø)
dkist/tests/generate_aia_dataset.py	36.17% <0.00%> (ø)
dkist/io/asdf/tags/dataset.py	88.88% <0.00%> (ø)
dkist/io/asdf/generator/generator.py	94.82% <0.00%> (ø)
... and 13 more

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