chore: Format code with gofumpt

[alexandear]

This PR enables gofumpt formatter and formats all code with golangci-lint fmt.

gofumpt detects missing empty lines between functions like in #3687 (comment)

[gmlewis]

Beautiful, @alexandear! Thank you for doing this!
Of all the changes, the only one that I really don't like is the very last one: 0600 => 0o600 but I can live with that one. 😂

[gmlewis]

@willnorris - suddenly, with this one PR, I lost the ability to approve the two workflows above (EDIT:) below.
Are you able to tell if I am no longer officially a maintainer of this repo, or do I need to get the OSPO team involved?
Or maybe GitHub itself just had some sort of regression and I need to wait it out? 😂

EDIT: It looks like I may no longer have write access to the repo maybe? I'm not sure how I lost it.

[gmlewis]

Ah! I just received this email, which is BOGUS, as I have ALWAYS had two-factor authentication enabled ever since it was first introduced!!!

So I think GitHub itself just had a MAJOR regression, unfortunately.

[gmlewis]

@google-admin - could you please add me back to the "Google" organization for this repo, as GitHub seems to have had some sort of glitch that kicked me out.

[willnorris]

Yeah, that's weird. It looks like I have basically the same security config as you (couple of passkeys, etc), and I still have access. (Also, when did GitHub add Login with Google? That's interesting... I never noticed that before)

[gmlewis]

Yeah, that's weird. It looks like I have basically the same security config as you (couple of passkeys, etc), and I still have access.

Weird indeed. Thanks for the confirmation.

(Also, when did GitHub add Login with Google? That's interesting... I never noticed that before)

Actually, I don't even remember. It must have been years ago.