Adds detection for ThinOS, Citrix Workspace, Citrix VPN and improves detection for macOS, Apple, Dell

[liviuconcioiu]

https://www.dell.com/support/manuals/en-us/optiplex-7410-65w-aio/thinos_2308_tpl/dell-thinos-2308-third-party-licenses?guid=guid-b2ca53ae-79fa-4c4f-b0be-6b47c6e0c10f&lang=en-us
https://i.dell.com/sites/doccontent/shared-content/data-sheets/en/documents/dell-wyse-thinos-ia.pdf
https://docs.citrix.com/en-us/citrix-workspace-app-for-mac/security-authentication/authenticate.html
https://www.julianjakob.com/citrix-adc-nfactor-user-certificate-authentication-or-the-demystifying-of-user-agent-header/
https://vditoolbox.com/2021/01/06/dell-wyse-thinos-9-netscaler-adc/