ci: overall enhancements and cosmetics improvements

[khos2ow]

What does this do / why do we need it?

This PR enhances Makefile by:

• adding a help target, and colorizing the outputs of commands
• normalize Go execution (specifically adding CGO_ENABLED=0 to build)

Also it cosmetically improves CI jobs by:

• unify them under ci
• unify naming
• unify Go version
• add an [ci skip] switch (if commit message include it, CI will be skipped)

Note: for readability I've splited them into two commits, and I personally prefer to not squash merge them. But not entirely sure what will happen to our changelog if there will be a merge commit. Anyways, either way will work (or if need be I can move one to its own PR)

Check lists

• Test passed
• Coding style (indentation, etc)

[coveralls]

Pull Request Test Coverage Report for Build 703224017

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.76%

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Totals
Change from base Build 702345926:	0.0%
Covered Lines:	1843
Relevant Lines:	2401

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💛 - Coveralls

[clok]

I want to note that a "Squash and Merge" will retain the commit messages as markdown bulleted lists in the commit message of the merge. See ae3382b7 as an example. I find this effective at logging the commits within a squashed commit.

The other option is a "Rebase and Merge" which does what it says in the name. That would accomplish truly separating the commits on the main line branch.

Typically, I reserve "Rebase and Merge" for items that are deemed to require an atomic separation of the commits to 1) help with maintaining why work was done and 2) allow for a more discrete change set with complex features. I do not support using "Rebase and Merge" when then are 10+ commits within a PR. Just too much noise at that point.

I am open to either in this situation. Let me know your thoughts.

[clok]

I have been working with make for a looooong time now and today you taught me some cool and useful stuff! Thank you for this @khos2ow!

You should consider dropping some of this knowledge on https://makefiletutorial.com/. I feel like the help command example could be useful on that tutorial site.

[clok]

TIL: shell replaces newlines with spaces. Hmm

[clok]

Man, this is cool! 🍻

[clok]

🎨

[khos2ow]

I want to note that a "Squash and Merge" will retain the commit messages as markdown bulleted lists

That's great, let's go with this. I'm just gonna go on record and say I hate "Rebase and Merge", it's even worse than squash and merge! lol

I feel like the help command example could be useful on that tutorial site.

I cannot take the whole credit here, I merely have modified this a bit along the way in the past working on top of other folks modification (I can take some credit for log-% part of it! 😉). But original help implementation was introduced here: https://marmelab.com/blog/2016/02/29/auto-documented-makefile.html