Function listing

[jlaamanen]

List all exposed functions either somehow from the generated client-side package, or its own "catalog" message type.

It would be very useful to get the list of all available functions (along with all the typings & JSDoc) especially for the dev tools extension (#5) for trying out individual functions as easily as possible.

Risks

Could it be a security threat to list all the functions? They are visible in the generated client-side package anyway. All the admin functions would also be visible, as there isn't a way to exclude them.