Improve CLI documentation by adding examples

[jrschumacher]

Much of the CLI is lightly documented. Add examples to enrich the experience.

• TDF - Encrypt, Decrypt, Inspect feat: refactor encrypt and decrypt + CLI examples #418
• Policy
  • Attributes - Namespace, Def, Value
  • Subject Mappings
  • Resource Mappings
  • KAS
• Profiles
• Auth