Implement Basic Cell Input Validation

[Shrivalkumar]

Feature: Add input validation for cells

1.Prevent non-numeric inputs and limit cell input length.
2.Add error messages and visual indicators for invalid inputs.
3.Ensure invalid data cannot be saved to the spreadsheet state.

[mrinal1224]

This has some merge conflicts , can you please update you code and try again @Shrivalkumar

[mrinal1224]

@Shrivalkumar Can we remove the non-numeric validation part, as our spreadhseet should allow alphabets and symbols as data , not all cells should only accept numbers let's revert back on this , only the numbers we specify as numeric should have these validation , apologies that it wasnt clear before
Thanks