Add to IP Access List analyzer to merge consecutive blocks

[alexott]

For example, GitHub actions IP ranges have a lot of entries like:

    "13.105.49.0/31",
    "13.105.49.2/31",
    "13.105.49.4/31",
    "13.105.49.6/31",
    "13.105.49.8/31",
    "13.105.49.10/31",
    "13.105.49.12/31",
    "13.105.49.14/31",
    "13.105.49.16/31",
    "13.105.49.18/31",

that could be efficiently collapsed into a one or few bigger ranges. For example, here 128 entries could be efficiently merged into 13.105.49.0/24...