Generate code from VS Code extension

[lars-reimann]

Is your feature request related to a problem?

To run a Safe-DS program, holding the generated code in memory suffices. However, it would still be nice to request the manifestation of this code as files, e.g. to further modify the Python code or just for debugging. This should not require using the CLI.

Desired solution

Add a command to the extension to generate code. Open questions:

1. Should we only create code for a single file or all files in the workspace?
2. Where should the generated files we stored (in a single folder/next to the source files/configurable)?
3. Should we create source maps (yes/no/configurable)?

We might want to use tasks for this (instead of, say, commands).

Possible alternatives (optional)

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Additional Context (optional)

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