feat: Support for multiple-attribute querying with AND operators

[DRK3]

• The server now supports querying for multiple attributes with AND operators when using MongoDB. Support for OR operators to come in the future.

• Also updated query format to be in line with the current spec.

• Since the ability to return full documents from queries is now officially in the spec, I've removed it from the "extension" list - it's now just a regular part of the server.

• Also updated some docs.

Signed-off-by: Derek Trider Derek.Trider@securekey.com

[codecov[bot]]

Codecov Report

Merging #244 (6ea236c) into main (325e1bd) will increase coverage by 0.24%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #244      +/-   ##
==========================================
+ Coverage   85.93%   86.17%   +0.24%     
==========================================
  Files          13       13              
  Lines        1628     1613      -15     
==========================================
- Hits         1399     1390       -9     
+ Misses        145      141       -4     
+ Partials       84       82       -2     

Impacted Files	Coverage Δ
cmd/edv-rest/startcmd/start.go	80.91% <100.00%> (-0.05%)	:arrow_down:
pkg/client/client.go	88.77% <100.00%> (-0.17%)	:arrow_down:
pkg/edvprovider/edvprovider.go	90.83% <100.00%> (-0.71%)	:arrow_down:
pkg/restapi/operation/operations.go	89.13% <100.00%> (+1.32%)	:arrow_up:

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