use pre-commit.com hooks for everything

[maxtaco]

• upgraded pre-commit to reference more lenient go lint
• remove old pre-commit hook
• instructions for using the new

[maxtaco]

I realize this is a pretty big change in workflow, so calling in reviews from @gabriel, @zanderz and @patrickxb

[patrickxb]

Looks ok, i think?

[maxtaco]

haven't heard back, going to just put this in. @gabriel and @zanderz we can always change it later

[slaver84]

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