Rewrite based on typer CLI library

[jeff-schnitter]

This pull request is a full rewrite of the CLI centered around the typer library and better code modularization.

Improvements

• Added sub-commands:
  • api-keys
  • custom-metrics
  • initiatives
  • workflows
• Removed sub-commands:
  • team hieararchies
• added --table and --csv options to list commands

Breaking Changes

• custom-events -i timestamp changed to -ts timestamp
• plugins get command changed to list
• plugins get-by-tag subcommand changed to get
• resource-definitions command changed to entity-types

[jeff-schnitter]

Will need to update publish workflow in next commit.