chore(web): Add story background setting

[nina992]

Overview

In This pr we give the user the ability to modify the color of story background.

What I've done

• Add color field to story setting
• Modify the gql query
• Make sure the story bgColor modified in/out editor mode
  
  

What I haven't done

How I tested

Which point I want you to review particularly

Memo

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[codecov]

Codecov Report

Merging #775 (5f43539) into main (9c4c84a) will decrease coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 12.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #775      +/-   ##
==========================================
- Coverage   25.81%   25.81%   -0.01%     
==========================================
  Files        1636     1636              
  Lines      179304   179327      +23     
  Branches     3920     3920              
==========================================
+ Hits        46289    46294       +5     
- Misses     131926   131944      +18     
  Partials     1089     1089              

Flag	Coverage Δ
web	24.05% <12.50%> (-0.01%)	⬇️
web-beta	24.05% <12.50%> (-0.01%)	⬇️
web-classic	24.05% <12.50%> (-0.01%)	⬇️
web-utils	24.05% <12.50%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
web/src/beta/features/Editor/Visualizer/hooks.ts	0.00% <ø> (ø)
web/src/services/gql/__gen__/gql.ts	100.00% <100.00%> (ø)
web/src/services/gql/__gen__/graphql.ts	100.00% <ø> (ø)
web/src/beta/components/fields/ColorField/types.ts	0.00% <0.00%> (ø)
...c/beta/features/Editor/Visualizer/convert-story.ts	0.00% <0.00%> (ø)
...rojectSettings/innerPages/PublicSettings/index.tsx	0.00% <0.00%> (ø)
web/src/beta/features/PublishedVisualizer/hooks.ts	0.00% <0.00%> (ø)
web/src/beta/features/PublishedVisualizer/types.ts	0.00% <0.00%> (ø)
web/src/beta/lib/core/StoryPanel/types.ts	0.00% <0.00%> (ø)
web/src/services/gql/fragments/story.ts	0.00% <0.00%> (ø)
... and 9 more

... and 3 files with indirect coverage changes