Describe the bug

Declarations in the safeds package or any subpackage are always available. If explicit imports are missing, however, no imports are created in the Python code. This also leads to failures in the runner: "name 'Table' is not defined".

To Reproduce

Safe-DS:

package test

pipeline myPipeline {
    val table = Table.fromColumns([]);
}

Python:

# Pipelines --------------------------------------------------------------------

def myPipeline():
    table = Table.from_columns([])

Expected behavior

The following code should be created:

# Imports ----------------------------------------------------------------------

from safeds.data.tabular.containers import Table

# Pipelines --------------------------------------------------------------------

def myPipeline():
    table = Table.from_columns([])

Screenshots (optional)

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Additional Context (optional)

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