Compatibility fixes, cli improvements and code formatting

Changed

• migrate to python-package-template, see merge request !60
• implement custom warning handling, see merge request !61
• fallback to nearest index when not found, see merge request !62
• improve guessing of coordinates based on their names, see merge request !63
• Fix enhanced attrs, see merge request !66
• minor fix for matplotlib 3.8 compatibility, see merge request !68
• implement ci-matrix for different python and mpl versions, see merge request !69
• Update plugin guide, see merge request !71

Added

• Add metadata info, see merge request !64, !65
• improve cli yaml options, see merge request !67