Feature Request: Enforce Birth Year Rules for Date Fields

Title: Enforce Birth Year Rules for Date Fields

Description:
Introduce a validation rule for date fields that ensures the entered year is a configurable number of years or days in the past, such as at least 5 years ago. This will help prevent clients from mistakenly entering the current year as their birth year.

Benefits:

Reduces data entry errors
Saves time on manual corrections
Enhances user experience with better form validation

Current Workarounds and Limitations:

Setting the date field to "Past Dates" helps but doesn't fully prevent errors.
Using a text field for manual entry is less user-friendly and prone to mistakes.

Implementing this feature will significantly improve the accuracy and reliability of data collected through PandaDoc forms.