Quick addition of generalized keyboard commands

[Real-Septicake]

Description

Added kb_cmd.h and its test files

Issue #

Type of change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)

Testing

I wrote test_kb_cmd.h

Test Configuration:

• Hardware: Qemu 6.2.0 on Linux Mint 21.3 x86_64
• OS: Linux Mint (bookworm/sid virginia) 21.3 x86_64

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[Sploder12]

Nice work! Just a few things that need to be addressed
(Also probably avoid explicit profanity 😉)

[Sploder12]

Good work! 1 missed static and this should be good to go!