WIP: Implement support for multiple notes

Refactor Vue <-> Editor <-> CodeMirror code.
Introduce Pinia store to keep global state, in order to get rid of a lot of event juggling between Editor class/child components and the root App component.

public/langdetect-worker.js

@@ -28,6 +28,7 @@ onmessage = (event) => {
                     },
                     content: content,
                     idx: event.data.idx,
+                    path: event.data.path,
                 })
                 return
             }
@@ -53,6 +54,7 @@ onmessage = (event) => {
                     },
                     content: content,
                     idx: event.data.idx,
+                    path: event.data.path,
                 })
                 return
             }
@@ -66,6 +68,7 @@ onmessage = (event) => {
                     },
                     content: content,
                     idx: event.data.idx,
+                    path: event.data.path,
                 })
                 return
             }