Buy USDC using the app

[xmonader]

Is your feature request related to a problem? Please describe

Ability to buy USDC using credit cards

Describe the solution you'd like

• Go to the market page

• Press Buy USDC on stellar

• Amount of USDC they want to buy

• If < 10k:
  Give them X choices (tell them % loss)
  Each choice should link to a page where it's filled in so they just need to use credit card

• if higher than 10k, Suggest them to go on an exchange e.g. Binance, Kraken and buy USDC there and then transfer to Stellar. We need a super small ebook (docusaurus based building on github, so it's clear this is community based info) for that which is only focused on that part.