Better techniques for pythonic bundle access

[wyli]

• command line API for bundle discovery, loading
• pythonic access to prepare pretrained weights from servers
• a few data examples provided for each bundle workflow

Task List:

• Add MetaProperties (6834 Add MetaProterties and update load API  #6835) (P0)
• enhance load API (6834 Add MetaProterties and update load API  #6835) (P0)
• add create_workflow (6834 Add MetaProterties and update load API  #6835) (P0)
• Add tags to help with categorization and searching(meta_data.json) (P1)
• Add a small example of the data structure for each dataset in bundle (P1)
• predict API: support directly predict using bundle (P1)
  I think we can directly predict bundle now, mark as solved for now.