Added Functions Ipv4cidrtoipv4range and Ipv6cidrtoipv6range to Calculate the Lower and Higher Bounds for an IP in the Subnet Using a CIDR

Why it matters

These functions provide an easy way to determine the IP range covered by a CIDR block, enabling users to perform subnet calculations directly in ClickHouse. This solves the problem of manually computing IP subnet boundaries and simplifies network-related queries and analysis.

How to use it

Use the functions <code>IPv4CIDRtoIPv4Range(cidr)</code> for IPv4 CIDR blocks and <code>IPv6CIDRtoIPv6Range(cidr)</code> for IPv6 CIDR blocks. Each function returns a tuple containing the lower and upper bounds of the IP range covered by the provided CIDR. For example:

SELECT IPv4CIDRtoIPv4Range('192.168.1.0/24');
SELECT IPv6CIDRtoIPv6Range('2001:db8::/32');