enhanced validation

[duggal1]

   THINGS I HAVE CHANGED 
     .       Minimum and maximum length validation (3-100 characters).
•	Restricted to alphanumeric characters and basic punctuation
•	Length constraint of 20-500 characters.
•	Restriction against offensive language using a simple regex; you can expand the list as necessary.
•	Restricted to alphabetic characters (no numbers or special characters).
•	Length constraint of 3-20 characters
•	Ensures the URL is valid and points to an image resource (uses async fetch with HEAD to check content-type).
•	Pitch:
•	Requires at least 10 characters.

[vercel]

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