docs: Pi-5 k0s installation instructions

[ramessesii2]

Description

This PR adds Raspberry Pi 5 guide for installing k0s.

Fixes # (issue)

Type of change

• Documentation update

How Has This Been Tested?

• Manual test

Checklist:

• My code follows the style guidelines of this project
• My commit messages are signed-off
• I have performed a self-review of my own 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
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[PrashantR30]

Looks very good @ramessesii2

[twz123]

Nice! Thanks a lot.

Just left some minor formal style nits.

[ramessesii2]

Thanks @PrashantR30 and @twz123 for the quick feedback.
I've merged your suggestions as well Tom.

[twz123]

Now that I co-authored this, someone else needs to approve ... 👼

[ramessesii2]

@jnummelin please help reviewing.

[jnummelin]

LGTM as all the comments from @twz123 are incorporated