[Feature Request] himl cli - deep filter

[revaapriyan-ta]

Consider the following .yaml file.

examples/simple/default.yaml

deep:
  key1: v1
  key2: v2
deep_list:
- item1
- item2

Request

A feature to filter deep keys like, deep.key1, deep.key2. Currently, the cli supports only top-level keys to filter. (ie, deep and deep_list in the example)