Implement execution order indicator

Use this to make the file/symbol result active again when narrowing out of a editor symbol search.

Fixes #93317

Part of #93317

It's at the bottom as it's a different kind of troubleshooting to
the rest of the items.

Fixes #93283

fixes #93087

#93087

debug: If a debug completion item sets a selection we need to use snippets to make sure the selection is selected

fixes #90974