Use external template files for output generation

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User Story

As a user I want to use my own templates for the output generation, so that I can make specialized changes for my experiment.

Description

As a user I want to use external templates files.
I am able to process them in the experimental process.
This increases the flexibility to use and reuse files that were prepared in advance for my configurations.

Acceptance Criteria

• I am able to use external files as templates instead of the default ones
• When I test, the output is the same as if I created the configuration file manually