docker compose v2 is part of Docker nowadays. Rather than calling
a separate Python lib that calls `docker-compose`, call `docker compose`
and use v2.
Fix the `-` and `_` difference between v1 and v2.
This will need THOROUGH testing

PFM-827

the old type, `network.external.name` is deprecated on v2. It still works
but it may be removed in future. Change to new format. See:
docker-archive/compose-cli#1856

this code will only ever be used in this version of the tool, and the
`__version__` only checks the version of the _tool_ anyways.

Also remove redundant print statements

if we create a container using compose v1 and we want to use or remove it
using compose v2, we will need to convert its name to use the new format

there are times where the container name consists of multiple names or
a name and then a number; for example, composename-container-name-1-1.
We want to keep only `container-name-1`. Ensure this is possible

Use the most logical version number for the next major version of this.

This version of Kubetools introduces some unavoidable breaking changes
that we can work around. Document these in the README.

…mpose v2

add incompatible version of Docker Desktop to CHANGELOG and add more detail
to README as to why we need to be careful with this update

suggest migrating to secure Docker registries, reword the suggestion to use the legacy builder

Co-authored-by: Germain Chazot <[email protected]>

make the code easier to test by moving the name conversion into its
own function and add test coverage

also add test coverage for `dockerise_label`

add `TROUBLESHOOTING` section to README to document the issue with
`insecure-registries` and link this to ticket which is open and relevant,
for `buildx`.

remove anything from the CHANGELOG which belongs here