Various improvements to streamline example code

[janvonrickenbach]

• Add self contained example that builds an ACP model from a cdb file that just contains the mesh.
• Add workflow helper to simplify file transfer operations
• Move to_pyvista function one level lower so that the user does not have to specify the component enums.
• Add tree printer

closes #343
closes #232

Todo:

• How should we handle the dependency on pydpf-composites?

Done

• Add docs
• Add description to example
• Upload example files to examples repo
• Complete tree printer including docs
• Add tests for workflow with and without temp directory
• Add type inference tests for plots.
• Expose labels in the same way as the remaining data
• check if runtime type matches the declared type for VectorData and ScalarData
• Convert pyACP unit system to dpf unit system

Postponed:

• Implement interactive tree for ipython notebook. Add interactive tree visualization #348
• Improve plots on mesh (add simpler interface for direction plots with a mesh) Improve plotting API #349
• Complete start from existing project example Finish example that starts from existing project #357
• Add tests for workflow with and without temp directory with local installer. Probably best implemented as ARM test. Implement ARM test which runs examples #354
• Adapt workflow when cdb is stored in acph5 Adapt workflow once cdb file is stored in the acph5 file #355
• Follow up on Dpf blocks result file pydpf-core#1373 and Wrong legend when importing launch_mapdl pymapdl#2700 Follow up bugs in other packages #356

[greschd]

Looks good overall! Some nit-picky discussion points below.

[greschd]

I've just noticed the following: when running the tests with a local executable, we now get new and modified files (tracked by git) in the tests/data directory. This should probably be addressed by modifying the corresponding tests.

I haven't looked into it in detail, but if I'd have to guess: this is probably because the tests previously used a tempdir by default.

[janvonrickenbach]

I've just noticed the following: when running the tests with a local executable, we now get new and modified files (tracked by git) in the tests/data directory. This should probably be addressed by modifying the corresponding tests.

I haven't looked into it in detail, but if I'd have to guess: this is probably because the tests previously used a tempdir by default.

Yes has been resovlved by creating additional temp directories in some tests.