chore: add explanations about how to use gofumpt in vim

[grepsuzette]

How has this been tested?

It's what I have been using for a weekmonth or two.
There may be more succint ways to do this.

BTW if someone knows how to have lint enabled in vim on .gno files, let me know.

[tbruyelle]

Have you seen this https://github.com/gnolang/gno/blob/master/CONTRIBUTING.md#vim-support ?
This is what I use and it works well.

[thehowl]

For me I just changed gofmt to gofumpt as I had it installed in my $PATH 😄 But this can be a good way to avoid installing it.

For what regards linting in Gno files, I haven't configured it yet. But it probably can be done in a "basic" manner with revive. It would be cool to have it with golangci-lint using the configuration of the repository and adding support for linting gno files.

[tbruyelle]

Have you seen this https://github.com/gnolang/gno/blob/master/CONTRIBUTING.md#vim-support ? This is what I use and it works well.

Oh sorry I didn't notice this was a PR so I hadn't look at the code before submitting my answer 😅

Indeed the comment about gofumpt involves that it is in the PATH 🙏

[thehowl]

This looks good to me, but I'll ask @moul to merge, as I know CONTRIBUTING is one of the "protected" files in CODEOWNERS :)