[WIP] chore(payments-next): Create proof of concept for free trials

[david1alvarez]

Because:

• We need the ability to support free trials for our customers

This commit:

• Adds in the code for a proof-of-concept that only applies to the monthly 123DonePro plan in dev

Closes #PAY-3499

Checklist

Put an x in the boxes that apply

• My commit is GPG signed.
• If applicable, I have modified or added tests which pass locally.
• I have added necessary documentation (if appropriate).
• I have verified that my changes render correctly in RTL (if appropriate).

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This code is not intended to impact staging or production environments.