dev branch: add DCO and LICENSE

dev branch: add garbage collect method to storage

server: allow extra spaces in scopes

go-oidc sends an extra space before the list of scopes. This is bad
but we have to support it, so we'll be more lenient and ignore
duplicated whitespace.

dev branch: add tests for refreshing with explicit scopes

dev branch: check if a provider supports a refresh token scope

Some OpenID Connect providers, notably Google, don't follow the spec
and allow refresh tokens to be requested with the "offline_access"
scope. Try to determine which we're talking to by checking the
supported_scopes listed by the provider discovery.

dev branch: expose skip approval screen option

server: fix cross client scope prefix

dev branch: add a password resource for local email/password login

dev branch: prepare build scripts for a release

storage: increase the number of bytes randomly generated for IDs

dev branch: add a simple gRPC API

server: add a test for the health check handler

storage/sql: enable garbage collection

Was an oversite of the initial SQL PR.