Vue3 migration

This page tracks https://github.com/gbv/cocoda/issues/583 with additional notes and discussion

The vue3 branch is automatically deployed at https://coli-conc.gbv.de/cocoda/vue3/.

Remove APIs

Please check if Cocoda feature has been removed from Cocoda code or it never used the feature anyway

• keyCode support as v-on modifiers
• $on, $off and $once instance methods
• Filters
• Inline templates attributes
• $children instance property
• propsData option
• $destroy instance method. Users should no longer manually manage the lifecycle of individual Vue components.
• Global functions set and delete,
• and the instance methods $set and $delete. They are no longer required with proxy-based change detection.