handle checklists at Open Text intent

app/src/main/kotlin/com/simplemobiletools/notes/pro/activities/MainActivity.kt

@@ -403,12 +403,19 @@ class MainActivity : SimpleActivity() {
 
     private fun openPath(path: String) {
         openFile(path, false) {
-            var title = path.getFilenameFromPath()
-            if (mNotes.any { it.title.equals(title, true) }) {
-                title += " (file)"
+            val title = path.getFilenameFromPath()
+            val fileText = it.readText().trim()
+            val checklistItems = fileText.parseChecklistItems()
+            val note = if (checklistItems != null) {
+                Note(null, title.substringBeforeLast('.'), fileText, TYPE_CHECKLIST)
+            } else {
+                Note(null, title, "", TYPE_TEXT, path)
+            }
+
+            if (mNotes.any { it.title.equals(note.title, true) }) {
+                note.title += " (file)"
             }
 
-            val note = Note(null, title, "", TYPE_TEXT, path)
             addNewNote(note)
         }
     }