Feat: text search in publication

[SifAa]

Implement search in publication

• iOS implementation
• Android implementation
• Flutter sends and receives over the bridge and from apps using the package

These should also be implemented, but perhaps at a later date, so that we to start with just have the most basic feature

• iOS: optional highlight most recent searchword in all publication or the place chosen to navigate to
• iOS: implement search preferences
• Android: optional highlight most recent searchword in all publication or the place chosen to navigate to
• Android: implement search preferences