Support listIndexes command

[rumyantseva]

Description

Closes #278.

Readiness checklist

• I added/updated unit tests.
• I added/updated integration/compatibility tests.
• I added/updated comments and checked rendering.
• I made spot refactorings.
• I updated user documentation.
• I ran task all, and it passed.
• I ensured that PR title is good enough for the changelog.
• (for maintainers only) I set Reviewers (@FerretDB/core), Assignee, Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[w84thesun]

Nice one! Added some comments.

[codecov]

Codecov Report

Merging #1960 (4e95409) into main (12a702e) will increase coverage by 8.03%.
The diff coverage is 68.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1960      +/-   ##
==========================================
+ Coverage   62.00%   70.03%   +8.03%     
==========================================
  Files         317      317              
  Lines       15654    15702      +48     
==========================================
+ Hits         9706    10997    +1291     
+ Misses       5121     3737    -1384     
- Partials      827      968     +141     

Impacted Files	Coverage Δ
internal/handlers/tigris/msg_listindexes.go	72.22% <64.70%> (+72.22%)	⬆️
internal/handlers/pg/msg_listindexes.go	74.13% <68.42%> (+74.13%)	⬆️
internal/handlers/tigris/tigrisdb/collections.go	61.90% <100.00%> (ø)
internal/handlers/tigris/tigrisdb/insert.go	65.07% <100.00%> (+50.79%)	⬆️
internal/handlers/common/filter.go	84.65% <0.00%> (ø)
internal/handlers/common/params.go	96.32% <0.00%> (+1.33%)	⬆️
...nternal/handlers/tigris/tigrisdb/query_iterator.go	82.81% <0.00%> (+1.56%)	⬆️
internal/handlers/tigris/tjson/schema.go	81.52% <0.00%> (+1.63%)	⬆️
internal/handlers/tigris/tjson/tjson.go	78.33% <0.00%> (+2.77%)	⬆️
internal/handlers/tigris/tjson/document.go	46.98% <0.00%> (+3.61%)	⬆️
... and 45 more

Flag	Coverage Δ
integration	66.28% <68.00%> (+11.70%)	⬆️
mongodb	14.22% <0.00%> (-0.05%)	⬇️
pg	54.59% <34.66%> (+0.12%)	⬆️
tigris	44.93% <33.33%> (?)
unit	28.96% <2.66%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

[w84thesun]

👍

[noisersup]

💯

[AlekSi]

I don't think we should test through RunCommand in general: we want compatibility with apps through drivers, not with specs/docs via RunCommand. There are some exceptions like drop that hide some errors, but they are exceptions. There is no need to over-test simple commands like listIndexes