Add obvious file extensions in `to_..._file` methods

[lars-reimann]

Is your feature request related to a problem?

When calling e.g. Table.to_csv_file an error is raised, if the given path does not have the file extension .csv.

Some other functions like Image.to_png_file don't check the file extension and just create a file with the given path.

Desired solution

1. Behavior should be consistent.
2. For ease of use, we could check whether the path already has the correct file extension:
   • If it does, we use it as is.
   • If it has no extension, we add the obvious one.
   • if it has a wrong extension, we raise an error.

Possible alternatives (optional)

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Screenshots (optional)

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Additional Context (optional)

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[lars-reimann]

🎉 This issue has been resolved in version 0.24.0 🎉

The release is available on:

• v0.24.0
• GitHub release

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