v0.16.0

• Breaking Change: Ydb.Sdk.Yc.Auth version <= 0.1.0 is not compatible with newer versions.
• Added IAuthClient to fetch auth token.
• Added the CachedCredentialsProvider class, which streamlines token lifecycle management.
• Breaking Change: Deleted AnonymousProvider. Now users don't need to do anything for anonymous authentication.
  Migration guide:

  var config = new DriverConfig(...); // Using AnonymousProvider if Credentials property is null

• Breaking Change: Deleted StaticCredentialsProvider. Users are now recommended to use the User and Password
  properties in DriverConfig for configuring authentication. Migration guide:

  var config = new DriverConfig(...)
  {
      User = "your_username",
      Password = "your_password"
  };

Full Changelog: v0.15.4...v0.16.0