Added TIMESTAMP Synonym for DateTime Type

Why it matters

This feature introduces TIMESTAMP as an alias for the DateTime type to improve compatibility and familiarity for users coming from other SQL databases that commonly use TIMESTAMP. It helps reduce confusion and increases ease of use when working with date and time data types.

How to use it

Users can now use TIMESTAMP interchangeably with DateTime in table definitions and queries. For example, when creating a table, specify a column as TIMESTAMP instead of DateTime without any other changes needed.