[feat] Add primary language field to repository GQL

[rohitvinnakota-codecov]

Purpose/Motivation

What is the feature? Why is this being done?

Following up from #321, adds the language field to the Repository type. This will be consumed in gazebo to conditionally render an ATS tab. This PR closes codecov/engineering-team#930.

Links to relevant tickets

codecov/engineering-team#930

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. In 2022 this entity acquired Codecov and as result Sentry is going to need some rights from me in order to utilize my contributions in this PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (94bc9b0) 95.64% compared to head (62ec1bb) 95.64%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #323   +/-   ##
=====================================
  Coverage   95.64   95.64           
=====================================
  Files        730     730           
  Lines      16433   16436    +3     
=====================================
+ Hits       15716   15719    +3     
  Misses       717     717           

Flag	Coverage Δ
unit	96.01% <100.00%> (?)
unit-latest-uploader	96.01% <100.00%> (?)

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[codecov-staging]

Codecov Report

All modified and coverable lines are covered by tests ✅

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[codecov-qa]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (main@94bc9b0). Click here to learn what that means.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #323   +/-   ##
=======================================
  Coverage        ?   96.01%           
=======================================
  Files           ?      615           
  Lines           ?    15925           
  Branches        ?        0           
=======================================
  Hits            ?    15291           
  Misses          ?      634           
  Partials        ?        0           

Flag	Coverage Δ
unit	96.01% <100.00%> (?)
unit-latest-uploader	96.01% <100.00%> (?)

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

☔ View full report in Codecov by Sentry.
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[codecov-public-qa]

Codecov Report

❗ No coverage uploaded for pull request base (main@94bc9b0). Click here to learn what that means.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #323   +/-   ##
=======================================
  Coverage        ?   96.01%           
=======================================
  Files           ?      615           
  Lines           ?    15925           
  Branches        ?        0           
=======================================
  Hits            ?    15291           
  Misses          ?      634           
  Partials        ?        0           

Flag	Coverage Δ
unit	96.01% <100.00%> (?)
unit-latest-uploader	96.01% <100.00%> (?)

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

Files	Coverage Δ
graphql_api/types/repository/repository.py	100.00% <100.00%> (ø)

[JerrySentry]

Main discussion here: https://sentry.slack.com/archives/C04LW8R1M2N/p1704210521062999

Its fine to add this field to the GQL response, however beware what this language value represents and how it will be consumed. Its an arbitrary value retrieved from git providers' APIs, just because it shows one language doesn't mean that language exists in the repo nor does it mean it does not have any other languages.

[rohitvinnakota-codecov]

codecov/engineering-team#811 (comment)

Main discussion here: https://sentry.slack.com/archives/C04LW8R1M2N/p1704210521062999

Its fine to add this field to the GQL response, however beware what this language value represents and how it will be consumed. Its an arbitrary value retrieved from git providers' APIs, just because it shows one language doesn't mean that language exists in the repo nor does it mean it does not have any other languages.