You can already access the Tor network to circumvent censorship, so what is your use case? These questions would be better asked on the Tor Project Forum:
No, you cannot run software to circumvent local internet level (ISP level) censorship inside Whonix-Workstation.
If you cannot reach Tor, you can also not reach onions. And if you cannot reach onions, you cannot connect censorship circumventing software to onions.
How to use shadowsocks for censorship circumvention? Undocumented.
The tunnel via SOcks5 or VPN should run via TOR, because then I think 6 hops in tor network are possible !
If you access clearnet websites via the normal workstation, you only have 3 hops !
So basically the workstation would connect via tor network to the .onion Socks5 or .onion VPN Server which then connects to clearnet - 6 hops or actually 7 because you have the server in between.
yes but please read, I said that when you connect to CLEARNET. then you have 3 hops.
To solve this problem, it should be possible to connect to a socks or vpn via onion (6 hops) which acts as an gateway to the clearnet.