Adding custom information to Chisel for CIRCT Passes

Hi, I'm trying to add some optimization information in Chisel, which will eventually become the `attr-dict` for operators in CIRCT IR. This way, a custom pass can use this information to transform the circuit.

I found that `firrtl.annotations.SingleTargetAnnotation` can achieve this if I add a `LowerAnnotations` function in CIRCT. However, it seems that `SingleTargetAnnotation` is deprecated, with the message: "All APIs in the firrtl package are deprecated."

Is there a replacement for `firrtl.annotations`? Or a way to directly add the attribute into the CIRCT IR?