added gradle-tooling doc. splitted up the tooling into maven/gradle/cli

[stalep]

No description provided.

[stalep]

i decided to split out the maven tooling into a separate document. users interested in maven are not interested in gradle and vice versa. - but if others disagree im fine with trying to weave it all into one doc.

[emmanuelbernard]

Looks good overall. I think I preferred a single tooling doc but it would have made for a verbose solution.
The main problem is the missing CLI adoc file.

[gsmet]

@stalep I added additional comments.

Please ping me when you applied the changes and added the CLI guide. I will review it again.

[n1hility]

So based on our discussions last week and just now (including with @emmanuelbernard ), we have a bunch of usability work with tool that we are out of time to do (e.g. how do you get the tool, does it install maven since you can't use the project without maven, etc). We can skip the CLI section for now. and merge without it.

[gsmet]

@stalep even if we don't include the CLI guide tomorrow, I added a few comments. I think the most important one is the s/MICRONAUT/QUARKUS/ one.

It would be nice if you could amend the commit so that it doesn't appear in the history.

[stalep]

i rebased it all into one commit, thanks again for the reviews @gsmet !

Changes look to be applied