[red-knot] Add support for editable installs to the module resolver (#12307)

Co-authored-by: Micha Reiser <micha@reiser.io>
Co-authored-by: Carl Meyer <carl@astral.sh>

crates/ruff_db/src/system.rs

@@ -150,6 +150,10 @@ impl DirectoryEntry {
         Self { path, file_type }
     }
 
+    pub fn into_path(self) -> SystemPathBuf {
+        self.path
+    }
+
     pub fn path(&self) -> &SystemPath {
         &self.path
     }