add: global notes

crates/core/src/model/journals.rs

@@ -60,6 +60,7 @@ pub struct Note {
     pub dir: usize,
     /// An array of tags associated with the note.
     pub tags: Vec<String>,
+    pub is_global: bool,
 }
 
 impl Note {
@@ -77,6 +78,7 @@ impl Note {
             edited: created,
             dir: 0,
             tags: Vec::new(),
+            is_global: false,
         }
     }
 }