Rafcon

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- Bug fixes:
- Fixed bug where data port would not reset properly
- Fixed bug when relocating an existing data flow

- Miscellaneous:
- Added proper deletion of gvm variables on shutdown

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- Bug fixes:
- Fixed AboutDialog logo image path
- Bringing back state editor guide lines
- Fixed issue that children states can be dragged out of parent states (same for state titles)
- Fixed issue where CTRL+Z in Source Editor or Description would undo twice instead of once
- Fixed cramped Linkage Overview widget (now properly displays the logical linkage)
- Fixes bug when trying to connect a data port outside of the parent state

- Miscellaneous:
- Updated docs text, configuration and layout for webpage

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- Bug fixes:
- Fixed bug for logic connectors
- Added logo to about dialog

- Miscellaneous:
- Updated pdm.lock
- Added minimal rafcon core tutorial in docs
- Updated formatting and deprecation for docs
- Updated citation formatting

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- Bug fixes:
- Updated deprecated dependency to jsonconversion
- Added new test state machine for backward compatibility testing

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- Features:
- Added option to disable popups in the config file
- Display warning when saving new state machine (and overwriting) in already existing folder

- Bug fixes:
- Fixing segmentation fault when changing state type in gui via state editor
- Fixing decider node is not preempted in concurrency state
- Fixed warnings and bugs in unit tests
- More minor bugfixes

- Miscellaneous:
- Checked dependencies and deprecations for libraries
- Updated shebang versions to python3
- Removed some warnings resulting from old python conventions

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- Features:
- Switch from setup.py to pyproject.toml and pdm for the python package management
- Add bump2version to avoid human errors when updating the rafcon version
- Added auto-layout functionality (as a first version)