feat: implement pizza offboard command

[zeucapua]

Description

Implements a new pizza offboard command that allows the user to offboard contributors from the .sauced.yaml config and CODEOWNERS files by their attributed name or email.

Related Tickets & Documents

Closes #117

Mobile & Desktop Screenshots/Recordings

Area.mp4

Steps to QA

1. Build the program
2. Ensure you have the .sauced.yaml and CODEOWNERS files
3. Run pizza offboard <usernames/emails> with the user(s) you want to offboard

• eg: pizza offboard zeudev [email protected]

4. REQUIRED: Use the --path (-p) flag to specify what repository you are updating
5. Use the --config (-c) global flag to specify the config, separate from the --path directory
6. After running, check the config and owners files to ensure that any attributions to the offboarded users are removed

Tier (staff will fill in)

• Tier 1
• Tier 2
• Tier 3
• Tier 4

[optional] What gif best describes this PR or how it makes you feel?

[nickytonline]

This works, but it wasn't clear to me that I had to put a space between people or emails I wanted to offboard. I tried using a comma initially.

It'd also be nice to detect the .sauced.yaml like we do with generate.

A future feature could be loading a CSV of people to offboard, but now I'm scope creeping. 😅

[jpmcb]

Nice work! 👏🏼 👏🏼