CLI: infisical secrets set with multi line secret

[felixhummel]

Feature description

There should be a way to set multi-line secrets via the CLI.

Why would it be useful?

For certificates (PEM files) for example.

Additional context

infisical secrets --silent --projectId=$INFISICAL_PROJECT_ID set --path /some-path foo=$(cat my-new.crt)

breaks with

panic: runtime error: index out of range [1] with length 1

Should

I would expect something like this to work:

infisical secrets --silent --projectId=$INFISICAL_PROJECT_ID set --path /some-path foo < my-new.crt

Note the missing =. Infisical should read from STDIN.