chore: upgrade to React 18 and switch to React Router

[KaWaite]

Overview

closes reearth/reearth#286

What I've done

What I haven't done

** Can't upgrade apollo/client until apollo-upload-client's @type repo is fixed to match the ApolloLink types **

How I tested

Screenshot

Which point I want you to review particularly

Memo

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[codecov]

Codecov Report

Merging #234 (4fc6690) into main (22aa9da) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #234      +/-   ##
==========================================
+ Coverage   51.24%   51.33%   +0.08%     
==========================================
  Files          56       56              
  Lines        1163     1165       +2     
  Branches      182      182              
==========================================
+ Hits          596      598       +2     
  Misses        505      505              
  Partials       62       62              

Impacted Files	Coverage Δ
src/components/atoms/Box/index.tsx	36.00% <ø> (ø)
src/components/atoms/Flex/index.tsx	100.00% <ø> (ø)
src/components/atoms/Text/index.tsx	63.63% <ø> (ø)
src/gql/graphql-client-api.tsx	35.78% <ø> (+0.16%)	⬆️
src/i18n/provider.tsx	83.33% <ø> (ø)
src/i18n/publishedProvider.tsx	0.00% <ø> (ø)
src/test/utils.tsx	100.00% <ø> (ø)
src/auth/index.tsx	33.33% <100.00%> (+33.33%)	⬆️
src/auth/provider.tsx	20.00% <100.00%> (ø)
src/gql/provider.tsx	3.12% <100.00%> (ø)
... and 3 more