One executable for all CLI commands by using Cobra

[consolethinks]

Proposal for a single executable based Scicat CLI tool

I would like to create a PR for a code rewrite that would put all of the separate executables defined in cmd/ into one, where each component would get their own subcommand.

This would basically mean: Instead of calling the command this way:

./[command_name] (flags) (params)

We'd have the following convention:

./scicat-cli [command_name] (flags) (params)

This would be achieved through the Cobra library.

As an example of this concept, here's my globus library with a built-in cli implementation.

• Feature/cobra cli #79
• configure CI to allow for prereleases
• v3 -> main merging