test removing dollar for objects out of system (#20242)

* test removing dollar for objects out of system

* test & fixes

* fix bootstrap

* use nimPreviewSlimSystem, test stdlib category

* fix test

compiler/ast.nim

@@ -747,6 +747,9 @@ type
     module*: int32
     item*: int32
 
+proc `$`*(x: ItemId): string =
+  "(module: " & $x.module & ", item: " & $x.item & ")"
+
 proc `==`*(a, b: ItemId): bool {.inline.} =
   a.item == b.item and a.module == b.module
 

compiler/passaux.nim

@@ -22,6 +22,8 @@ proc verboseOpen(graph: ModuleGraph; s: PSym; idgen: IdGenerator): PPassContext
   # xxx consider either removing this or keeping for documentation for how to add a pass
   result = VerboseRef(config: graph.config, idgen: idgen)
 
+import std/objectdollar
+
 proc verboseProcess(context: PPassContext, n: PNode): PNode =
   # called from `process` in `processTopLevelStmt`.
   result = n