Upgrade slash-commands support

[ghost]

Currently, the tool checks for the whole comment body to match the command. It may be more convenient to check for the command to show up anywhere in the body of the comment.

[lazyparser]

It may be a good idea to detect the first char of every line, leaving other slash strings untouched.

e.g.

/slash parse it
comment /do-not-parse

[ghost]

That's a good idea. Then we can just use the rest of that line for arguments to the command. So it could be:

/retest precheck
/retest all
/retest build run

[lazyparser]

Yes. That's exactly the way other slash commands utility/tools does.

After you pushed the initial codes, we can add more sub commands :)

[lazyparser]

and the /retest should be the alias to /retest all :)

[lazyparser]

I've read the code. It's clean and clear :)
I'll continue to add new features if needed.