fix(ramp-network): adds API key from .env variables

[schmanu]

What it solves

Resolves #655

How this PR fixes it

Enables the Ramp network Safe App by adding an API key through .env variables.

How to test it

Test that the App does not show an error when providing a valid API key.

[github-actions[bot]]

• Drain Account App
• RAMP Network App
• Sign-In With Ethereum Delegate Manager App
• Tx Builder App
• WalletConnect app
• MMI App