feat: refactor dataset create

[b8raoult]

Description

This is a rewrite of the code that parses the recipe and invoke the sources and filters in the right order. These changes are merely a simplification of the old version and are 100% backward compatible.
The input family of actions has been refactored such that all the standalone action files, e.g. concat are consolidated into a single action.py.

Additional related additions.

• Add facility to have a source as a parameter of an other source if needed.
• Changes are due to code moving to their own file (i.e repeated_dates).
• A new CLI tool anemoi-datasets recipe was added to check the change. It can be use to format the YAML and validate it (against a simple JSON schema), and migrate older YAML files to new syntax. The later is experimental, and as been tested with very old recipe files. It can be a good starting point for future migrations, if ever needed.

What problem does this change solve?

This change is in preparation of adding support for observation in anemoi-dataset[create].

What issue or task does this change relate to?

Additional notes

As a contributor to the Anemoi framework, please ensure that your changes include unit tests, updates to any affected dependencies and documentation, and have been tested in a parallel setting (i.e., with multiple GPUs). As a reviewer, you are also responsible for verifying these aspects and requesting changes if they are not adequately addressed. For guidelines about those please refer to https://anemoi.readthedocs.io/en/latest/

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[aaron-hopkinson]

Will approve once the comment on the copy command is resolved, because I think that will break something.

We need to either revert the change to the copy command or reopen PR #151 on anemoi-utils

[MeraX]

Thank you for your work and the consideration of my comments.