chore(build): add LOGFROM flag to check-pr rule

[geyslan]

1. Explain what the PR does

cf71376 chore(build): add LOGFROM flag to check-pr rule

commit cf71376

With this flag, the git log output is filtered to only include commits
from the specified commit to the current HEAD.

make check-pr                # from main (default)
make check-pr LOGFROM=v0.1.0 # from tag/branch
make check-pr LOGFROM=HEAD~1 # from commit
make check-pr LOGFROM=f3a4b2 # from commit

This also changes check-pr output format and adds information for using
its output in the PULL_REQUEST_TEMPLATE.md file.

2. Explain how to test it

See commit above.

3. Other comments

[rafaeldtinoco]

can we change a bit the format from "check-pr"? I'm not using it because I don't like the format. I use it to check everything needed, but I wont copy and paste the results.

2 things that bothers me:

1. Format:

93a5329 chore(build): add LOGFROM flag to check-pr rule (2023/jul/27) Geyslan Gregório geyslan@gmail.com

I believe we can make:

<hash> description

2. The "more" or "less" my pager does when make check-pr finishes.

Can we make those adjustments in this PR ?

[rafaeldtinoco]

Feedback from this change:

I think the last list of commits should include the subject as well, to avoid empty stuff when the commit logs have a single subject line with no other lines.

Also, I still have a pager automatically called for the last part (it would be good not to have it so I can copy and paste all the output at once).

[rafaeldtinoco]

@geyslan FYI

[geyslan]

Ok, raising other PR with that change.

xclip -selection clipboard can be used but it would demand to check the tool and possibly override clipboard content. So, related to that, I'll let it as it is.