[FEATURE] add functionality to NodeConnection class

[mationorato]

🚀 Feature

• use unfetch for data fetching
• build promise base functions
• we should build a function that points to every endpoint at snarkvm
• set_account function

how it should work:

const con = new NodeConnection("hostname/ip")
const acc = new Account()

con.setAccount(acc)

con.get_records()

[mationorato]

closed by #9