refactor(web): update Beta theme

[KaWaite]

Overview

What I've done

• Went back to using one theme provider
• temp put classic theme in theme.classic
• Updated all theme use syntax (most of the files changed)
• Beta fonts now align with Figma
• Beta reearthThemes are reduced and a general structure is put in place

What I haven't done

How I tested

Which point I want you to review particularly

Memo

[codecov]

Codecov Report

Merging #504 (5963da1) into main (116936c) will increase coverage by 0.67%.
The diff coverage is 30.28%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #504      +/-   ##
==========================================
+ Coverage   26.01%   26.69%   +0.67%     
==========================================
  Files        1330     1328       -2     
  Lines      144449   144246     -203     
  Branches     3485     3476       -9     
==========================================
+ Hits        37582    38503     +921     
+ Misses     105745   104621    -1124     
  Partials     1122     1122              

Flag	Coverage Δ
web	24.02% <30.28%> (+0.85%)	⬆️
web-beta	24.02% <30.28%> (+0.85%)	⬆️
web-classic	24.02% <30.28%> (+0.85%)	⬆️
web-utils	24.02% <30.28%> (+0.85%)	⬆️

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

Impacted Files	Coverage Δ
web/src/beta/components/Avatar/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Button/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/ContentPicker/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Dropdown/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Loading/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Modal/ModalFrame/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Modal/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Resizable/index.tsx	0.00% <0.00%> (ø)
web/src/beta/components/Slider/index.tsx	0.00% <0.00%> (ø)
web/src/beta/features/Editor/SidePanel/index.tsx	0.00% <0.00%> (ø)
... and 247 more

... and 19 files with indirect coverage changes

[keiya01]

LGTM! Thank you!