feat: Enable Indexing of array fields

[islamaliev]

Relevant issue(s)

Resolves #2279

Description

Enable indexing of array fields.

This change also adds IsEqual method to NormalValue.

[codecov]

Codecov Report

Attention: Patch coverage is 87.28653% with 67 lines in your changes missing coverage. Please review.

Project coverage is 79.99%. Comparing base (4e5470c) to head (045bbc7).

Files with missing lines	Patch %	Lines
internal/db/index.go	77.72%	22 Missing and 19 partials ⚠️
internal/db/fetcher/indexer_iterators.go	80.22%	10 Missing and 8 partials ⚠️
internal/db/collection_index.go	80.00%	1 Missing and 1 partial ⚠️
internal/db/fetcher/errors.go	0.00%	2 Missing ⚠️
internal/planner/filter/merge.go	75.00%	1 Missing and 1 partial ⚠️
client/normal_nillable_array.go	95.83%	1 Missing ⚠️
internal/planner/type_join.go	66.67%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3092      +/-   ##
===========================================
+ Coverage    79.81%   79.99%   +0.18%     
===========================================
  Files          351      352       +1     
  Lines        27335    27757     +422     
===========================================
+ Hits         21816    22204     +388     
- Misses        3982     3987       +5     
- Partials      1537     1566      +29     

Flag	Coverage Δ
all-tests	79.99% <87.29%> (+0.18%)	⬆️

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

Files with missing lines	Coverage Δ
client/index.go	88.24% <ø> (ø)
client/normal_array.go	100.00% <100.00%> (ø)
client/normal_array_of_nillables.go	97.62% <100.00%> (+1.87%)	⬆️
client/normal_nillable_array_of_nillables.go	100.00% <100.00%> (ø)
client/normal_nillable_scalar.go	100.00% <100.00%> (ø)
client/normal_scalar.go	100.00% <100.00%> (ø)
client/normal_void.go	97.89% <100.00%> (+0.07%)	⬆️
client/schema_field_description.go	65.76% <100.00%> (+5.40%)	⬆️
internal/core/encoding.go	79.91% <100.00%> (+0.28%)	⬆️
internal/core/key.go	83.02% <100.00%> (+0.42%)	⬆️
... and 13 more

... and 14 files with indirect coverage changes

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[AndrewSisley]

Part way through reviewing, looks really great so far, only very localised comments atm :)

[AndrewSisley]

Looks really good Islam, just a couple more todos from me before merge

[AndrewSisley]

Looks really good Islam, thanks for this :)