Convert existing Script Runner dialogs to Composition API

[EmilyRagan]

The is the beginning of the transition to Composition API, starting with Script Runner. Existing dialog components were very easy to convert using Claude. The diffs are unfortunately too great to sync up the lines, but the changes are straightforward:

• Props have the same type information as before
• Prop values are now accessed via props.<propName> within the script, instead of this.<propName>
• Computed values are now accessed via <computedName>.value within the script, instead of this.<computedValue>
• Use defineModel over explicit computed with emit where appropriate
• Data values that are mutable are defined with ref, immutable values are just const
• Data values are accessed and updated via <dataName>.value within the script, instead of this.<dataName>
• Methods are now accessed just by their name, without this.
• created lifecycle hook is replaced by onMounted for some cases, immediate initialization in other cases
• Promise chaining was updated to use async/await

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.23%. Comparing base (02086f8) to head (1c673bb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2828      +/-   ##
==========================================
- Coverage   78.25%   78.23%   -0.02%     
==========================================
  Files         673      673              
  Lines       55191    55191              
  Branches      728      728              
==========================================
- Hits        43190    43181       -9     
- Misses      11923    11932       +9     
  Partials       78       78              

Flag	Coverage Δ
python	79.33% <ø> (-0.01%)	⬇️
ruby-api	79.52% <ø> (-0.17%)	⬇️
ruby-backend	82.17% <ø> (ø)

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Quality Gate failed

Failed conditions
3 New issues

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