ENH: allow in-script tagging in ioc-deploy

[ZLLentz]

Description

Main goal: allow us to make releases from the command line without going to the github website, for convenience

Main changes:

• If the provided release number does not exist, prompt the user to create a new tag.
• Enforce Rx.x.x format for the new tag
• The new tag is an annotated tag if we're adding a message to it, and a non-annotated tag otherwise
• Show the last commit message to the user for tag context, confirmation that they pushed their code, and as the defacto "default" message if they decide not to include one with their tag

Other things to note:

• Increase logging consistency between shell out functions
• Have a special message for KeyboardInterrupt, since it's way more likely to happen when the user is dropped into a text prompt, and seeing a traceback when you do it is a bit annoying.
• With --auto-confirm, the tag will be made automatically with no message.

I also snuck some smaller changes into here

Motivation and Context

https://jira.slac.stanford.edu/browse/ECS-6035

For releasing hutch-specific templated IOCs that amount to version bumps, etc., people have expressed that they find it annoying to open up github and do by hand what in the past they had done all in the command-line, so I provide these features here.

This isn't so necessary or useful for when you're already on github doing a code review process.

How Has This Been Tested?

Interactively only

Where Has This Been Documented?

Added to the help text and readme

[ZLLentz]

The diff here still shows the variant from before the other PR was merged, I'll see if closing and re-opening fixes it

[ZLLentz]

It worked, now with the updated diff I'll have an easier time writing the description and the reviews will be simpler later too.

[ZLLentz]

This is likely the last ioc-deploy PR for a while unless new bugs are found

[ZLLentz]

One more re-check from me that the main code paths work after the minor adjustments and then I'm clicking merge!