Regression, this file should not be in the tree
cli: Use metaprogramming to generate code during runtime when new apis sync

- Fixes metaprogramming to inject methods during shell class object's runtime
- This enable new apis that are synced to come up with new verbs, docs etc.
- Fixes printing issue
- Fixes null bitfield parsing issue

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>