feat: Add support for Automation

[Gottox]

Summary

This commit adds support for running specific actions when a card is created/deleted in a stack or enters/exits a stack.

Usecase 1:

I'm using deck to track my personal work and I have two stacks where I create new cards: "Nice-to-do" and "Need-to-do" before this commit I added the labels manually, so that I could track that that I always have enough work that I like to do and do enough work that I have to do. With this patch, I'm giving the user an option to automatically add tags on creation.

I can come up with more usecases, especially if I wanna track what happened to a card in a non-linear way, this tool is gold.

• Target version: main

TODO

• Unit tests
• Documentation

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Documentation (manuals or wiki) has been updated or is not required

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