Implement local file system support for secrets rm

[aryanjassal]

Specification

This is a continuation of Polykey-CLI#247. In that issue, the secrets delete|del command was replaced by secrets rm command. The new command can remove multiple secrets from multiple vaults. If recursive option is passed, it can also remove directories along with their contents.

The secrets rm command currently only removes files and directories from the vault fs. It also needs to implement support for doing the same on the user's filesystem too, making its usage and operation seamless.

Additional context

• Continuation of Polykey-CLI#247.

Tasks

1. Allow secrets rm to remove system files and directories along with vault files and directories

[linear]

ENG-414 Implement local file system support for `secrets rm`