build: split deploy to unstable main workflow

[NyanKiyoshi]

Splits the build & deploy steps into two distinct jobs to reduce the blast radius and risk of malicious dependencies obtaining access to secrets.

Scope of the change

• I confirm I added ripples for changes (see src/ripples) or my feature doesn't contain any user-facing changes
• I used analytics "trackEvent" for important events

[changeset-bot]

⚠️ No Changeset found

Latest commit: 4052cb7

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.93%. Comparing base (9687868) to head (4052cb7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6514   +/-   ##
=======================================
  Coverage   47.93%   47.93%           
=======================================
  Files        2579     2579           
  Lines       45752    45752           
  Branches    10503    10519   +16     
=======================================
  Hits        21932    21932           
  Misses      23435    23435           
  Partials      385      385           

Flag	Coverage Δ
storybook	43.04% <ø> (ø)
units	43.71% <ø> (ø)

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