~[Installing] go get install deprecation

[Rom1deTroyes]

Deprecation of 'go get' for installing executables

@see https://go.dev/doc/go-get-install-deprecation and golang/go#40276

close #649

An other TODO will be to make the deprecation in the CICD and Makefile :

• cheat/.github/workflows/build.yml

  Line 24 in 7fe0fed

  run: go get -u github.com/boyter/scc github.com/mgechev/revive

• cheat/Makefile

  Line 118 in 768d55e

  GO111MODULE=off $(GO) get -u github.com/boyter/scc github.com/mgechev/revive

• cheat/Makefile

  Line 143 in 768d55e

  $(GO) get -t -u ./... && $(GO) mod vendor

But I got no time to make tests around today...
... Let's me know if you want me to do this simple change or if your preference goes to keep the CI/CD well maintained by yourself 🤔

[Rom1deTroyes]

The pagination is awful (made it directly from GitHub for a quick fix...) : I can redo this less poorly later if needed ☹

[llbbl]

This PR can be closed. #667 did a bit better job of explaining it. ✊🏼

[chrisallenlane]

@Rom1deTroyes

Thanks very much for your PR, and for your other comments regarding go install.

I ended up overhauling the documentation surrounding installation, and created an INSTALLING.md file:
https://github.com/cheat/cheat/blob/master/INSTALLING.md

As such, I'll close this PR without merging, but thanks for your time in putting it together.

Regarding your other remarks regarding go install.

That was a really good catch. I tried to make the proposed go install changes in the CI configuration and Makefile, but interestingly, it failed because other dependencies would fail to install. As best as I can tell, the root cause of the problem is that I'm not the only Go author that was caught unaware of the go install/module behavior changes:

boyter/scc#270

That being the case, I'll continue to use go get -u for installing external packages, because it works even though it's incorrect. Once this gets sorted out upstream, I'll make the corresponding changes to this project as well.

Thanks again for your help.