ref(onboarding): add hook for gettingStartedDocs

[roggenkemper]

this replaces a useEffect that was used in a few different places with a custom hook.

[codecov]

Codecov Report

Attention: Patch coverage is 63.15789% with 7 lines in your changes missing coverage. Please review.

Project coverage is 77.94%. Comparing base (7d1d769) to head (eec13ce).

❗ Current head eec13ce differs from pull request most recent head 7ceecf9

Please upload reports for the commit 7ceecf9 to get more accurate results.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #73439       +/-   ##
===========================================
+ Coverage   56.71%   77.94%   +21.22%     
===========================================
  Files        6628     6631        +3     
  Lines      296520   295033     -1487     
  Branches    51067    50752      -315     
===========================================
+ Hits       168169   229959    +61790     
+ Misses     123680    58738    -64942     
- Partials     4671     6336     +1665     

Files	Coverage Δ
...eedbackOnboarding/useLoadFeedbackOnboardingDoc.tsx	0.00% <0.00%> (ø)
.../onboarding/gettingStartedDoc/sdkDocumentation.tsx	80.00% <50.00%> (-8.24%)	⬇️
...s/replaysOnboarding/useLoadReplayOnboardingDoc.tsx	0.00% <0.00%> (ø)
.../gettingStartedDoc/utils/useLoadGettingStarted.tsx	73.33% <73.33%> (ø)

... and 2242 files with indirect coverage changes

[michellewzhang]

this is super nit and also my fault, but i don't like how i named the feedback one useLoadFeedbackOnboardingDoc and the replays one just useLoadOnboardingDoc ... do you mind renaming these to be either the same or the replay one to be useLoadReplayOnboardingDoc?

[sentry]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ Error: Cannot find module './python/python-celery' /feedback/ View Issue

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