Implement safety-critical command handling

[GitWorkingTime]

Purpose

Closes #502
Explain the purpose of the PR here if it doesn't match the linked issue. Be sure to add a comment in the linked issue explaining the changes.

• Update the safety-critical command handling using an ARM & EXECUTE design to prevent false triggers caused by operator mistakes

New Changes

Explain new changes below in short bullet points.

• Added CMD_ARM skeleton to the codebase
• Added CMD_EXECUTE skeleton to the codebase
• Added command response to both CMD_ARM and CMD_EXECUTE
• Waiting on Software Leads to give more info on the command's functionality

Testing

Explain tests that you ran to verify code functionality.

• I have unit-tested this PR. Otherwise, explain why it cannot be unit-tested.
• I have tested this PR on a board if the code will run on a board (Only required for firmware developers).
• I have tested this PR by running the ARO website (Only required if the code will impact the ARO website).
• I have tested this PR by running the MCC website (Only required if the code will impact the MCC website).
• I have included screenshots of the tests performed below.

Outstanding Changes

If there are non-critical changes (i.e. additional features) that can be made to this feature in the future, indicate them here.

[github-actions]

Pull reviewers stats

Stats of the last 120 days for UWOrbital:

	User	Total reviews	Time to review	Total comments
	Adityya-K	24	20h 4m	92
	kepler452b123	17	4d 1h 1m	74
	camspec	10	17h 17m	68
	Yarik-Popov	8	1d 4h 42m	65
	Navtajh04	6	5d 1h 23m	68

^{⚡️ Pull request stats}

[Adityya-K]

This is a really well done first commit! Just make sure to fix the CI/CD tests before you request a review since we usually want those passing before we merge anything into our main branch. I have only skimmed the PR right now but I will give it a closer look and update the instructions for what you need to do with these two commands!

[GitWorkingTime]

All checks have passed, now just waiting for further instructions