Release Notes for version 3.15.1

• [AGIPD] Add SPI hit-finder
• [AGIPD] Improve errors when no lit frames to correct
• [Gotthard2] Apply wrong_gain_value badpixel to all gain stages
• [Gotthard2] Skip plots if no raw data corrected in a notebook
• [TIMEPIX] Allow manual specification of the proposal
• [Webservice] More useful process name in systemd logs
• [Webservice] Log to stderr as well as files
• [Webservice] Fix overview page with newly submitted jobs
• [Documentation] Refactor README from RST to MarkDown and add jupyter usage installation instructions
• [Documentation] Update installation for using python 3.11.9
• [Documentation] Update documentation change logs from 3.14.2 to 3.15.0
• Update karabo ID of SQS Timepix detector
• Add unit files to manage services with systemd
• Ansible: Configurable python exec
• Remove Playground directories
• Remove report service directory