Add script to compare CML and containerlab topologies

[Copilot]

Creates a tool to identify which CML labs lack containerlab equivalents and suggests where to place them.

Implementation

• compare_cml_containerlab.py: Python script that scans both topology directories, performs normalized name matching (case-insensitive, handles .yaml, .virl.yaml, .clab.yml), and outputs a mapping of missing labs
• cml_without_containerlab.txt: Generated output showing 432 of 438 CML labs (98.6%) need containerlab versions
• README-comparison-script.md: Usage documentation and path mapping conventions

Key Features

• Handles duplicate topology names across CML folders (2 found, both included)
• Uses relative paths for portability
• Suggests containerlab paths following repository convention: containerlab/labs/{category}/cisco/{name}/{name}.clab.yml

Example Output

CML Topology                                       Suggested Containerlab Path                       
--------------------------------------------------------------------------------
cml/BGP/bgp-4-byte-asn.yaml                        containerlab/labs/bgp/cisco/bgp-4-byte-asn/bgp-4-byte-asn.clab.yml
cml/OSPF/ospf-single-area.yaml                     containerlab/labs/ospf/cisco/ospf-single-area/ospf-single-area.clab.yml

Run with: python3 compare_cml_containerlab.py

Original prompt

Create a list of labs I have for Cisco CML, but not for containerlab.

I'd like to get a list with the CML topology folder+file and what the containerlab folder+file should be.

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