Python-on-whales

Added a lot more attributes and docs for Docker objects. This will help a lot users to write readable code and let their IDE guide them.

One possible downside is that the parsing of the json is stricter now. If you encounter a parsing issue with pydantic, just open an issue and it'll be fixed very quickly. Parsing errors are very easy to fix. Most of the time, it's just needed to add `Optional[xxx]` to solve the problem.

* Added initial support for docker compose (the go version, not the python one).
* Fixed a bug where a docker image could not be retrieved after building with tags and a container driver.

* A lot of new buildx commands are now available, especially concerning the builders.
* We now remove the `return_image` in `docker.build()` since python on whales can infer if an image will be loaded.
* Fixed some bugs in the `output` option of `docker.build()`