Import iOS 15+ shortcuts on 13/14, and convert some actions to iOS 13/14

(Thanks to https://www.reddit.com/r/shortcuts/comments/opak23/backward_incompatibility_of_ios_15_shortcuts/)

• is.workflow.actions.output -> is.workflow.actions.exit
• is.workflow.actions.returntohomescreen -> is.workflow.actions.openapp to SpringBoard
• is.workflow.actions.file.select -> is.workflow.actions.documentpicker.open with WFShowFilePicker on
• If WFGetFilePath in is.workflow.actions.documentpicker.open and WFShowFilePicker not true, set WFShowFilePicker to false
• com.apple.shortcuts.CreateWorkflowAction -> is.workflow.actions.openurl with shortcuts://create-shortcut
• (iOS 13) is.workflow.actions.openworkflow -> is.workflow.actions.openurl with shortcuts://open-shortcut?name=(shortcut name)
• Get Device Details Global Var -> magic var to Get Device Details action

Pastcuts has the option to also enable using modern action names.

• Improve code
• For iOS 13, either convert the iOS 14 Calculate Expression to a group of actions or javascript that mimic the behavior (would work in stock but may be less reliable) - or add action using Calculate.framework (more reliable but wouldn't work in stock)
• For iOS 13-14.2, mimic the Set Wallpaper action in a jailbroken state. Make damn sure that the input can be a wallpaper - Set Wallpaper was in iOS 13 betas but very quickly scrapped due to bad inputs causing respring loops and wasn't added back until iOS 14.3. I have test devices on iOS 13, but none on iOS 14 so not sure if my bad hacky workaround for custom shortcut actions works on iOS 14, so maybe for iOS 14.2 just play it safe and have it be a Powercuts action.
• Move away from using Cephei for preferences
• Mimic iOS 16.2's Get Wallpaper action
• Option to change WFColor for a more modern version, or older version
• Look into iOS 12 support
• Multilingual support (use multilingual modern action names (no translators needed for this, just use native localized strings), ask for translators for preference bundle)
• Potentially hook -(void *)initWithRecord:(void *)arg2 storageProvider:(void *)arg3 migrateIfNecessary:(bool)arg4 environment:(long long)arg5 error:(void * *)arg6 {

• List by atnbueno: https://cdn.discordapp.com/attachments/491381450306748426/983409287768469534/ios_shortcut_actions.xlsx
• https://www.reddit.com/r/shortcuts/comments/pxrby9/new_actions_and_parameters_in_ios_15_and_macos/
• https://www.reddit.com/r/shortcuts/comments/tg9k6n/action_and_parameter_changes_in_ios_154_and_macos/
• https://www.reddit.com/r/shortcuts/comments/v6r57z/ios_16_beta_1_new_actions_and_parameters_in_ios/