feat: Allow for negative years

[lucalbus]

Allow for negative years in publication date field, with a regexp allowing for a "-" in the beginning, and 0 to four digits.

While typing, the intial "-" is allowed before typing the other digits. If the data is sent withtout the digits (only a "-" as date), the controller applies tryParse which returns null in this case and therefore "-" cannot be saved as a date even if the input is possible first.

[RomanKovtyukh]

While typing, the intial "-" is allowed before typing the other digits. If the data is sent withtout the digits (only a "-" as date), the controller applies tryParse which returns null in this case and therefore "-" cannot be saved as a date even if the input is possible first.

Can we avoid this situation on regex level? Having \d{1,4} in the regex will make user type at least one digit.

https://regex101.com/r/XbQx9m/1