[BUG] Enforce validations for matching pool funding

[Jikugodwill]

Describe the bug
We don't have a validation rule for the minimum matching pool donation amount ( which is min_matching_pool_donation_amountin the pot config )

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Pots page'
2. Click on any pot from the grid of pots
3. Click on "Fund Matching Pool"

Expected behavior
The user should see an error if they type numbers less than the pot's min_matching_pool_donation_amount and should not be able to submit the form data.

Screenshots

Desktop (please complete the following information):

• OS: MacOS Sequoia 15.1.1
• Browser: Chrome

Additional context
Add any other context about the problem here.