help output doesn't show all flags

https://github.com/cloudflare/matched-data-cli/pull/24/commits/ee53c2f0da99adca2709a279b63a41c59f69daa7

There are more flags than the help output indicate.

Can these be added (and more if they exist?):

decrypt -k, --private-key-filename File containing the base64 encoded private key
decrypt -o, --output-format Output format of matched data [default: utf8-lossy] [possible values: raw, utf8-lossy]
generate-key-pair -o, --output-format Output format of key pair [default: json] [possible values: json]

Review the CLI help output for the decrypt and generate-key-pair entry points, and compare it with the referenced pull request commit. Confirm whether the listed private-key-filename and output-format flags, plus any other existing flags, are included. Done when the help output documents all available flags with their descriptions, defaults, and possible values.

Written by the indexing model from the issue text.