refactor: 6054 Update WMGv2 Main

[tihuan]

Reason for Change

• refactor WMG2 Main #6054

Changes

1. Extract hooks into connect.ts
2. Extract useScaledMeanExpression() in hooks.ts, since it's too damn long 😂
3. Remove explicit version 2 passing to function argument. Like useCellTypesByTissueName(2) to just useCellTypesByTissueName()

Testing steps

1. App should work as before

Checklist 🛎️

• Add product, design, and eng as reviewers for rdev review
• For UI changes, add screenshots/videos, so the reviewers know what you expect them to see
• For UI changes, add e2e tests to prevent regressions

Notes for Reviewer

[github-actions]

Deployment Summary

• backend_url: https://pr-6257-backend.rdev.single-cell.czi.technology
• frontend_url: https://pr-6257-frontend.rdev.single-cell.czi.technology
• delete_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-6257-deletion:1
• migrate_db_task_definition_arn: arn:aws:ecs:us-west-2:***:task-definition/dp-rdev-pr-6257-migration:1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7851ae1) 91.79% compared to head (97554c8) 91.79%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6257   +/-   ##
=======================================
  Coverage   91.79%   91.79%           
=======================================
  Files         175      175           
  Lines       14207    14207           
=======================================
  Hits        13042    13042           
  Misses       1165     1165           

Flag	Coverage Δ
unittests	91.79% <ø> (ø)

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[kaloster]

Thanks for the refactor! LGTM 🚀

[tihuan]

Thanks for the quick review too! 🙌🔥

[tihuan]

CC: @seve this is the refactor PR!