* fixes for `diagnostics`
Replace `2 ** 22` with `512` as the default value of `diagnostics.TensorDiagnosticOptions`
also black formatted some scripts
* fixed formatting issues
* remove unnecessary changes
* add AMI prepare scripts
* add zipformer scripts for AMI
* added logs and pretrained model
* minor fix
* remove unwanted changes
* fix missing link
* make suggested changes
* update results