feat: localization (#196)

* Started adding locale translations :)

* Added some more translations

* Working on translating even more pages

* More translations

* Added test default locale retrieval

* replace `intl.formatMessage` with custom `t` hook

* add more translations

* improve title syntax

* add more translations

* translate admin config page

* translated error messages

* add language selecter

* minor fixes

* improve language handling

* add upcoming languages

* add `crowdin.yml`

* run formatter

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Co-authored-by: Steve Tautonico <stautonico@gmail.com>

backend/prisma/schema.prisma

@@ -136,7 +136,6 @@ model Config {
   type         String
   defaultValue String @default("")
   value        String?
-  description  String
   obscured     Boolean @default(false)
   secret       Boolean @default(true)
   locked       Boolean @default(false)