SwiftUI App template

basic feature

• document-based app
• use ReferenceFileDocument as document type
• use bundle/package as document

branch: main

• simple document-based app
• document contents is fixed (2 files in package)

branch: filesystem

• document-based app
• document can contain files like file-system
• at save, check changes in file then update FileWrapper

branch: filesystemWithGRDB

• document-based app
• document has "grdb.sqlite" file for GRDB file
• document still has other text files