* init MFA doc
* Improving texts
* Adding Admin MFA for Identity
* improving texts
* Adding a new paragragh
* Configure MFA for administration pages using ASP.NET Core Identity
* Send MFA signin requirement to OpenID Connect server
* updating the texts
* draft-ietf-oauth-amr-values-08
* removing comment
* improving texts
* text improvements
* Force mfa in Open ID Connect client
* typo
* improving texts
* updating text
* improving texts
* review fixes, recommended from @scottaddie
* improved text
* review fixes, recommended from @scottaddie
* review fixes, recommended from @scottaddie
* review fixes, recommended from @scottaddie round 2
* fix spacing
* review fixes
* remove Font Awesome text
* review fixes
* review fixes
* review fixes
* removed as not validated
* Added link to NIST guidlines
* review fix
* improve text
* add link in the correct place
* Removing font awesome
* Removing font awesome from image
* remove icon text, no longer used
* using standard claim amr with values mfa, pwd
* clean up
* apply code-fencing
* minor tweaks
* S -> s
Co-authored-by: Scott Addie <10702007+scottaddie@users.noreply.github.com>