IP in CIDR & CIDR in CIDR

[cheats-py]

What type of request is this?

New tool idea

Clear and concise description of the feature you are proposing

A tool to see if a given IP address resides within a given CIDR block. Also a tool to see if a given CIDR blocks resides within a given CIDR block.

IP in CIDR example:

• Does IP address 192.168.0.1 reside in CIDR 192.168.0.0/16 = yes
• Does IP address 192.168.0.10 reside in CIDR 192.168.1.0/24 = no

CIDR in CIDR example:

• Does CIDR 192.168.0.0/28 reside in CIDR 192.168.0.0/24 = yes
• Does CIDR 192.168.1.0/28 reside in CIDR 192.168.20.0/24 = no

Is their example of this tool in the wild?

Here is an example site for IP in CIDR: https://tehnoblog.org/ip-tools/ip-address-in-cidr-range/

Additional context

No response

Validations

• Check the feature is not already implemented in the project.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Check that the feature can be implemented in a client side only app (IT-Tools is client side only, no server).