* fix : split out the interface from the TwoFactorAuthenticationValidator into separate file.
* fix: replacing IUserService.TwoFactorEnabled with ITwoFactorEnabledQuery
* fix: combined logic for both bulk and single user look ups for TwoFactorIsEnabledQuery.
* fix: return two factor provider enabled on CanGenerate() method.
* tech debt: modfifying MFA providers to call the database less to validate if two factor is enabled.
* tech debt: removed unused service from AuthenticatorTokenProvider
* doc: added documentation to ITwoFactorProviderUsers
* doc: updated comments for TwoFactorIsEnabled impl
* test: fixing tests for ITwoFactorIsEnabledQuery
* test: updating tests to have correct DI and removing test for automatic email of TOTP.
* test: adding better test coverage
* Enforce free organization limit when updating user
* Add test for throwing error on accepting admin user joining multiple free organizations
* Add test for throwing BadRequest when free organization admin attempts to sign up for another free organization
* Fix user ID handling in UpdateOrganizationUserCommand for free organizations
* Rename parameter 'user' to 'organizationUser' in UpdateUserAsync method for clarity
