fix(cli): Create custom Command type to support custom Usage docs

[nicholasyager]

Resolves: #93

Description

This PR implements a custom Click Command type called TupleCompatibleCommand, which has a custom usage string implementation which places the [OPTION] metavar at the end of the usage string.

Original

dbt-meshify split [OPTIONS] PROJECT_NAME

Updated

dbt-meshify split PROJECT_NAME [OPTIONS]

This is important from a UX perspective, since --select and other type-typed options will eat all subsequent strings that are not themselves options. For example,

dbt-meshify split --select foo bar

will yield an error, since bar will be interpreted as part of the selector instead of as the project name.

Now, if users follow the example, we will have the following correct usage:

dbt-meshify split bar --select foo

[dave-connors-3]

🦞