Jack Ta

DRAFT: feat: add ability to purchase hbar via MoonPay

1

#### Description: - Adds a Buy option for Mainnet users. Once clicked on, will open a modal w/ an iframe pointing to MoonPay's hbar purchasing flow.

### Description I used to be able to `Mnemonic.generate()` and access the mnemonic words directly like so ... ``` Mnemonic.generate().then((mnemonic) => { const mnemonicPhrase = mnemonic.words; // 👈 // do...