Set up ktlint and swift-format

[bartekpacia]

Aim

To avoid wasting time during PRs for mundane things like indentation and other stuff that don't matter.

• ktlint is enforced for all kotlin code in PR github actions
• swift-format is enforced for all swift code in PR github actions

Scope

• Apply ktlint plugin to every project
  • perhaps create a convention plugin to not copy code too much
• Run both ktlint and swift-format on the whole codebase
  • add that commit to .git-blame-ignore-revs

This will ensure our codebase is consistent (desirable for such a big open-source project)

[bartekpacia]

• detekt, + SwiftLint