When Setzer is installed via Software, it fails to start afterwards complaining about a missing module.

===
Traceback (most recent call last):
  File "/usr/bin/setzer", line 31, in <module>
    from setzer.workspace.workspace import Workspace
  File "/usr/lib/python3.11/site-packages/setzer/workspace/workspace.py", line 24, in <module>
    from setzer.document.document import Document
  File "/usr/lib/python3.11/site-packages/setzer/document/document.py", line 19, in <module>
    import setzer.document.state_manager.state_manager as state_manager
  File "/usr/lib/python3.11/site-packages/setzer/document/state_manager/state_manager.py", line 21, in <module>
    from setzer.app.service_locator import ServiceLocator
  File "/usr/lib/python3.11/site-packages/setzer/app/service_locator.py", line 27, in <module>
    import setzer.app.autocomplete_provider.autocomplete_provider as autocomplete_provider
  File "/usr/lib/python3.11/site-packages/setzer/app/autocomplete_provider/autocomplete_provider.py", line 25, in <module>
    import bibtexparser
ModuleNotFoundError: No module named 'bibtexparser'
===

The python3-bibtexparser must be installed to address this issue. This package should become one of the requirements so that it gets installed automatically with the Setzer application.

Reproducible: Always

Steps to Reproduce:
1. Install Setzer using Software.
2. Try running the application.

Actual Results:  
See above.

Expected Results:  
Application runs normally without issues.