feat: add oauth2 support

composer.json

composer.lock

config.ini.example

docs/pages/changelog/index.md

docs/pages/docs/changelog/index.md

docs/pages/docs/extras/index.md

docs/pages/docs/features/configuration/index.md

docs/pages/docs/features/database/doctrine/entities.md

docs/pages/docs/features/graphql/developing-schema.md

docs/pages/docs/features/http/controllers.md

docs/pages/docs/features/http/middleware.md

docs/pages/docs/features/http/psr-http-messages.md

docs/pages/docs/features/http/sessions.md

docs/pages/docs/features/index.md

docs/pages/docs/features/security/authentication/index.md

docs/pages/docs/features/security/authorization/index.md

...s/docs/features/security/content-security-policy/index.md

docs/pages/docs/features/security/csrf-protection/index.md

docs/pages/docs/features/security/index.md

docs/pages/docs/features/security/oauth2/configuration.md