Document every OAuth member and namespace for the API reference

The documentation check of CI requires a comment on every API item and
a page for every namespace; 38 items of Progmasoft.OAuth had none. The
private handlers and helpers get summaries, MemoryOAuthDatabase its
field, and docs/api/namespaces describes Progmasoft.OAuth and its
Developers, Endpoints, Pages and Storage namespaces.

Verified: dotnet build in Release, dotnet docfx with warnings as
errors, and CheckDocumentation: all 353 API items are documented.

0 files changed, 0 insertions, 0 deletions