added allow-overlap parameter for notes

docs/notes.typ

@@ -5,13 +5,15 @@
 /// - color (color): The note's color
 /// - shape (str): The note's shape (see @@SHAPES for accepted values)
 /// - aligned (bool): True if the note is aligned with another note, in which case `side` must be `"over"`, false otherwise
+/// - allow-overlap (bool): If set to `false`, the note will try to reserve space in the column to avoid overlapping with neighboring participants. If set to `true`, the not will overlap other participants
 #let _note(
   side,
   content,
   pos: none,
   color: rgb("#FEFFDD"),
   shape: "default",
-  aligned: false
+  aligned: false,
+  allow-overlap: true
 ) = {}
 
 /// Accepted values for `shape` argument of @@_note()