Python-shortcuts

- Added dockerized cli tool

- New actions:
- Choose From List
- Open App

- Added new example: database [ShortcutDB](/examples/ShortcutDB.md). Get version with auto update feature and read documentation on [the website](https://shortcutdb.aleks.sh)

- Added system variables:
- `shortcut_input`
- `clipboard`
- `current_date`

- New actions:
- AppendFileAction
- GetDictionaryFromInputAction
- RunShortcut
- GetMyShortcutsAction
- GetTimeBetweenDates
- DetectDateAction
- OpenURLAction

- `IfAction` now supports variables in the parameter `compare_with`.

- Now raises `UnknownWFTextTokenAttachment` error when loader can't load field with unknown token attachment type.

- Added [fields documentation](/docs/fields.md)
- New actions:
- RepeatEachStartAction
- RepeatEachEndAction
- ChangeCaseAction
- SplitTextAction
- GetClipboardAction
- NumberAction
- HashAction
- SetClipboardAction
- SetDictionaryValueAction
- URLEncodeAction
- URLDecodeAction
- AppendVariableAction
- ShowDefinitionAction
- ScanQRBarCode
- GetTextFromInputAction
- GetNameOfEmoji
- DetectLanguageAction
- ExpandURLAction

- Save shortcut from URL without deserializing if output format is plist

- New example: [shields.toml](/examples/shields.toml)
- New action: SpeakTextAction
- Added `default=True` to field `SetLowPowerModeAction.on`.
- Removed `plutil` requirement
- Added ability to download shortcuts with `shortcuts` cli directly from iCloud