What does this PR do?

Custom Fields OR Add-Ons with a fee associated

• Fixes #7075
• Fixes CAL-3967

/claim #7075

Visual Demo (For contributors especially)

Video Demo (if applicable):

https://www.loom.com/share/c4fb241826874cc894837e85534cfd7d?sid=389aae54-dc26-428d-a902-6f4ae72bc25e

Right now pricing is supported for Number, Select, MultiSelect, Checkbox, Checkbox group and Radio group input type

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

Check the Video Demo