bind mount directories should be possible to set per kind and node

[hellt]

To allow mounting files to the containerlab modes, the mount option have to be created for kinds and nodes. The use case is to add custom binaries or configs for testing containers (like adding gobgp to a vanilla alpine)

kind_defaults:
    my_tools:
      type: custom
      image: pklepikov/ubuntu-tools
      mounts:
       - $(pwd)/exabgp /home/admin/exabgp
       - $(pwd)/gobgp /home/admin/gobgp

[karimra]

We need to add the permissions (ro/rw) as well, so maybe something like: -$(pwd)/exabgp:/home/admin/exabgp:rw

defaults to ro just like docker