Support searching for known services

[madnificent]

A search functionality for finding known services which can be added.

Problem description

Core services can be added using mu project add service <name> <version>. It is not often easy to find the right name of the service to be added. A search functionality and/or hints for services which you may have meant would be a good addition.

Ideal solution

When a name is entered which was not found, the index could be searched for a partial match. The full name and the available versions should be returned.

A new command which searches through the available services could be added to help exploration of the index.