feat: extend plugin API supports get scene inEditor

[airslice]

Overview

Plugin needs to know whether it's running with the earth editor.

For pages:
earth editor => true
preview => false
published => false
plugin editor => false for now. We can also update plugin editor's UI to support switch value if needed in the future.

What I've done

Implement plugin API

reearth.scene.inEditor: boolean

What I haven't done

How I tested

Screenshot

Which point I want you to review particularly

Memo

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[codecov]

Codecov Report

Merging #351 (bddad7e) into main (af55f1a) will decrease coverage by 0.00%.
The diff coverage is 4.54%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #351      +/-   ##
==========================================
- Coverage   18.38%   18.37%   -0.01%     
==========================================
  Files         514      514              
  Lines       51602    51622      +20     
  Branches      640      640              
==========================================
+ Hits         9485     9486       +1     
- Misses      42082    42101      +19     
  Partials       35       35              

Impacted Files	Coverage Δ
src/components/molecules/Visualizer/Plugin/api.ts	6.44% <0.00%> (-0.08%)	⬇️
...rc/components/molecules/Visualizer/Plugin/types.ts	0.00% <0.00%> (ø)
src/components/molecules/Visualizer/hooks.ts	0.00% <0.00%> (ø)
src/components/molecules/Visualizer/index.tsx	0.00% <0.00%> (ø)
src/components/molecules/Visualizer/storybook.tsx	0.00% <0.00%> (ø)
...ponents/organisms/EarthEditor/CanvasArea/index.tsx	0.00% <0.00%> (ø)
src/components/pages/EarthEditor/index.tsx	0.00% <0.00%> (ø)
...components/molecules/Visualizer/Plugin/context.tsx	30.38% <20.00%> (-0.16%)	⬇️

[rot1024]

Unify all isInEditor to inEditor