Unify pipeable input for all analysers

# Feature request

All analysers should

## Description

As a user, I want all parsers to accept pipeable input in a similar way so that i know what to expect for all parsers.

## Acceptance criteria
-
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## Assumptions & Exclusions

## Development notes
Currently the following analysers do not implement pipeable input: CSVImporter, SourceMonitorImporter, CodeMaatImporter, CSVExporter, Edgefilter, MergeFilter
The TokeiImporter uses an implementation thats different from all other analysers
The functionality can likely be implemented in the AnalyserInterface

## Open questions

Start by reading AnalyserInterface and comparing pipeable-input handling in the analysers named in the issue. Review CSVImporter, SourceMonitorImporter, CodeMaatImporter, CSVExporter, Edgefilter, MergeFilter, and TokeiImporter to identify the differing contracts. Done means all listed analysers accept pipeable input in a consistent way, with the TokeiImporter aligned to the others.

Written by the indexing model from the issue text.