[liana-cli] better documentation/examples

[pythcoiner]

An user recently contact me because he get some issues using liana-cli:

• there is only one example of using liana-cli here but it's not very helpfull
• [API doc] concern the format to passing direct message to the unix socket, not to liana-cli

I open this issue to record examples of liana-cli usages in order to write proper documentation.

[pythcoiner]

liana-cli --conf ~/.liana/regtest/daemon.toml createspend '{"bcrt1qh549zvh7sqcnf30dmqxqazvgwsh0kvtpxgh2qwrfanwjm22epuhs044art": 100000}' '[]' 1 'bcrt1q2cps2g8xm3lmy85563v8a7vlu60802c695jswfa33afmavevdhxqu5zprq'
{
  "result": {
    "psbt": "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",
    "warnings": []
  }
}