Support for MQTT

[danielbayerlein]

No description provided.

[Copilot]

PR Overview

This PR adds support for MQTT publishing and updates the overall configuration, documentation, and CI pipelines to accommodate the new data sink.

• Adds a new MQTT datasink using the paho-mqtt library.
• Updates configuration functions, tests, and documentation to include MQTT settings.
• Updates CI workflows, Python version requirements, and dependency versions.

Reviewed Changes

File	Description
sepicker/datasinks/mqtt.py	Introduces MQTT class for publishing data using paho-mqtt.
tests/test_can_bus.py	Adds tests covering CAN bus functionality.
tests/test_config.py	Updates tests for config reading including MQTT and MySQL.
.github/workflows/publish.yml	Configures Docker related actions for publishing artifacts.
.github/workflows/ci.yml	Updates CI workflow with new versions and Python 3.13.
README.md	Updates documentation to reflect new MQTT and MySQL integrations.
sepicker/main.py	Integrates both MySQL and MQTT datasinks in the main function.
sepicker/interface/can_bus.py	Refactors type hints and logger naming for consistency.
Pipfile	Updates dependencies and Python version to 3.13.
sepicker/config.py	Adjusts configuration loading and environment variable processing.
sepicker/elster/elster_frame.py	Adds type hints and minor cleanups to the ElsterFrame class.
sepicker/elster/elster.py	Improves type hinting and logging in the Elster class.
sepicker/datasinks/mysql.py	Updates type hints and logger naming in the MySQL datasink.

Copilot reviewed 26 out of 26 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

sepicker/elster/elster.py:21

• Avoid using 'type' as a variable name as it shadows the built-in Python function. Consider renaming it to 'msg_type'.

type = data[0] & 0x0f