Serve a file from https://helidon.io/cli-data/ containing all released Helidon versions and the MP spec each implements

[tjquinno]

For code generators (OpenAPITools at least, maybe the MP starter) it would be great to be able to retrieve a file containing all released Helidon versions and, for each, which MP spec version it implements.

This will allow users of generators to specify a prefix (or the entirety) of the version they want to generate for and the tool will select the highest actual release that matches the prefix using a simple string prefix check.

That highest-matching release can then be written into generated files as needed to refer to a valid Helidon release.

The format of the file is up for negotiation, just so long as it's easy to parse.