Add ENS resolver #1108

[etimofeeva]

Solves #1108

I've added ENS resolver function and helper functions to getAccountInfo , and I've updated getAccountInfo section in test-websocket.html to take either address or ENS in the descriptor.

Test data:

Tested for sepolia.eth:

I0602 05:18:29.593823    2640 websocket.go:271] Client connected 2, 172.17.0.1:35274
I0602 05:18:36.963859    2640 websocket.go:606] ENS Debug: data='0x0178b8bf1d689859765781bcbe48fe0c5f2c67bd63fc1ba4d35982090d7ad37ed7662081', to='0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e', from='0x0000000000000000000000000000000000000000'
I0602 05:18:37.017323    2640 websocket.go:614] ENS Debug: RPC result: 0x0000000000000000000000008fade66b79cc9f707ab26799354482eb93a5b7dd
I0602 05:18:37.017473    2640 websocket.go:625] ENS Debug: resolver address: 0x8fade66b79cc9f707ab26799354482eb93a5b7dd
I0602 05:18:37.017484    2640 websocket.go:628] ENS Debug: Second call - data='0x3b3b57de1d689859765781bcbe48fe0c5f2c67bd63fc1ba4d35982090d7ad37ed7662081', to='0x8fade66b79cc9f707ab26799354482eb93a5b7dd'
I0602 05:18:37.062836    2640 websocket.go:636] ENS Debug: Second RPC result: 0x0000000000000000000000009703d9cf2f834e71d9b70675e746f7b634c9d1e9
I0602 05:18:37.062981    2640 websocket.go:647] ENS Debug: Final resolved address: 0x9703d9cf2f834e71d9b70675e746f7b634c9d1e9

[MiroslavProchazka]

cc @martinboehm @vdovhanych