WIP auth code exchange

config/example-config.yaml

internal/config/config.go

internal/db/dbModels/accessToken.go

internal/db/dbModels/attribute.go

internal/db/dbModels/authcodeInfo.go

internal/db/dbModels/supertoken.go

internal/endpoints/configuration/configurationHandler.go

internal/endpoints/redirect/redirect.go

internal/endpoints/token/super/pkg/authCodeFlowResponse.go

internal/jws/jws.go

internal/model/apiError.go

internal/model/response.go

internal/oidc/authcode/authcode.go

internal/supertoken/pkg/supertoken.go

internal/supertoken/supertoken.go