feat(kumactl): allow apply of an entire directory

[lplazas]

Checklist prior to review

• Link to relevant issue as well as docs and UI issues --
  Apply Entire Directory using kumactl #8491
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
  • Don't forget ci/ labels to run additional/fewer tests
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --

[lahabana]

@lplazas thanks for the contrib and sorry it wasn't noticed earlier. Could you rebase it and make sure you sign-off your commit? Thanks!

[lplazas]

Oh no worries, I am missing the tests but I was behind schedule on many things so I couldn't look into them. I'll rebase shortly and finish off the tests.