Minimize hardcoded routes

[pictographer]

In lib.rs several routes are defined in init_web_server but have no corresponding representation in api.toml. Because of this, they are not included in documentation constructed from api.toml. For some routes, like catch all handlers for / and /*, this is appropriate, but for /help and /healthcheck, there's no reason for these to be treated specially. Adding them to api.toml would be simpler and more helpful.