Change Toggle SCSS to utilize CSS modules

[Coteh]

Bare minimum to fix #960 and make it renderable in Storybook.

[codecov]

Codecov Report

Merging #962 into master will decrease coverage by 29.58%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #962       +/-   ##
===========================================
- Coverage   52.69%   23.11%   -29.59%     
===========================================
  Files         139       76       -63     
  Lines        3418     1337     -2081     
  Branches      167      167               
===========================================
- Hits         1801      309     -1492     
+ Misses       1557     1028      -529     
+ Partials       60        0       -60     

Flag	Coverage Δ
#golang	?
#typescript	23.11% <ø> (ø)

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Impacted Files	Coverage Δ
frontend/src/component/ui/Toggle.tsx	100.00% <ø> (ø)
backend/app/adapter/sqldb/googlesso.go
backend/app/adapter/gqlapi/resolver/authquery.go
backend/app/usecase/shortlink/metatag.go
backend/app/adapter/sqldb/userrole.go
backend/app/adapter/gqlapi/resolver/changelog.go
backend/app/adapter/gqlapi/resolver/resolver.go
backend/app/adapter/sqldb/featuretoggle.go
backend/app/usecase/sso/identityprovider_fake.go
backend/app/usecase/sso/sso.go
... and 54 more

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