refactor: add make help to display the usage for project Makefile

[Halimao]

Description

This pr added a new make help function for displaying which commonly used commands that the Makefile supported. This is useful when a new developer goes to find a helpful tool for testing or building etc.

[guggero]

Thank you very much, this is super helpful. Also I think it's a great trick to semi-automate the help overview, do you mind if I use this for another project as well?

[Halimao]

Thank you very much, this is super helpful. Also I think it's a great trick to semi-automate the help overview, do you mind if I use this for another project as well?

Glad to see you like this😀

And all suggestion changes have been addressed~

[guggero]

tACK, LGTM 🎉

@Halimao can you please squash the two commits into a single one? Thanks.

[coveralls]

Pull Request Test Coverage Report for Build 7598453773

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 268 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.1%) to 56.784%

---

Files with Coverage Reduction	New Missed Lines	%
wire/msgblock.go	6	96.32%
peer/peer.go	7	74.16%
rpcclient/infrastructure.go	255	40.0%

Totals
Change from base Build 7618951160:	0.1%
Covered Lines:	29207
Relevant Lines:	51435

---

💛 - Coveralls

[Halimao]

tACK, LGTM 🎉

@Halimao can you please squash the two commits into a single one? Thanks.

Done~

[yyforyongyu]

LGTM ⛵

[guggero]

Thanks for the squash. But the commit message now is pretty non-descriptive. Can you update that to at least contain some context of what the commit changes? Then we can merge, thanks.

[Halimao]

Thanks for the squash. But the commit message now is pretty non-descriptive. Can you update that to at least contain some context of what the commit changes? Then we can merge, thanks.

Addressed~