Added wyHash64 Hash Function for SQL

Why it matters

The addition of the wyHash64 function provides users with a fast and efficient hashing algorithm to improve performance and distribution in hash-based operations such as joins, aggregation, and sharding.

How to use it

Use the new hash function wyHash64 directly in your SQL queries wherever a hash function is applicable, for example: SELECT wyHash64(column_name) FROM table_name;.