Add CLI commands for interacting with a secret store

[ramizpolic]

Idea

A user should be able to interact with a generic secret store though CLI.

Strategy

Following commands should be supported:

• store get-secret --key "key"
• store set-secret --key "key" --data "data"
• store list-secrets --path "path"

For now, handle auth by loading store from a file pointed by either SECRET_STORE_AUTH_FILEPATH env var, or provided via --store flag in these commands.

Future

Add flags to contextually load/switch between stores, e.g.

• store load NAME --from-file PATH to add a new store to local storage
• store use STORE to use a specific store
  This would require having a persistent local storage with stores for (ID, Name, Filepath) tuples