feat: add zikade DHT router

[iand]

Adds a dht/zikade routing type which corresponds to the refactored zikade DHT currently under development (previously go-libp2p-kad-dht/v2).

Requires ipfs/boxo#472

This is intended as a future experimental routing method for Kubo.

Can be tested with configuration like this:

	"Routing": {
	  "Type": "custom",
	  "Routers": {
	    "zikade": {
	      "Type": "dht/zikade",
	      "Parameters": {
	        "Mode": "auto",
	        "PublicIPNetwork": true
	      }
	    }
	  },
	  "Methods": {
	    "find-peers": {
	      "RouterName": "zikade"
	    },
	    "find-providers": {
	      "RouterName": "zikade"
	    },
	    "provide": {
	      "RouterName": "zikade"
	    },
	    "get-ipns": {
	      "RouterName": "zikade"
	    },
	    "put-ipns": {
	      "RouterName": "zikade"
	    }
	  }
	},

[Jorropo]

I don't think this name is correct, this router is compatible with v1.
So I don't think v2 applies here.

[iand]

It will allow different custom parameters, which I haven't added yet.

[Jorropo]

I mean network wise, it's just a different implementation, it's it will talk with other v1 dht servers and clients.
I would name it go-kademlia

The way I understand v2 here is that if I turn this I'm not part of the amino dht anymore.

[iand]

I see how this name could cause confusion between go-libp2p-kad-dht version 2 and version 2 of the dht protocols. I'll choose a better name - same for boxo

[iand]

Renamed router type to dht/zikade

[iand]

Resubmit when/if ipfs/boxo#472 is merged