Incomplete/incorrect impl and/or doc for encrypting secret key to place in config properties file

[tjquinno]

Environment Details

• Helidon Version: 2x, 3.x
• Helidon SE or Helidon MP
• JDK version:
• OS:
• Docker version (if applicable):

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Problem Description

A user has packaged up a Helidon app into a zip file and needs to let end users create an encrypted secret key to put into a config properties file. The instructions on this doc page do not work:
https://helidon.io/docs/latest/index.html#/mp/security/03_configuration-secrets#_encrypting_values_aes

Workaround/correction to doc:

cd <dir-where-zip-was-unzipped>
`java -cp libs/helidon-config-encryption-2.4.1.jar:libs/helidon-common-2.4.1.jar:libs/helidon-common-crypto-2.4.1.jar io.helidon.config.encryption.Main <rest of command>`

Or, we might want the manifest for helicon-config-encryption to declare a main and the correct class path. (Other command line options might need different JARs on the path.)

Steps to reproduce

Try to run the command in the doc. The command does not work; it is not clear at all where the JAR to be invoked actually is.