Upgrade gradle + windows commands in build.gradle

[StefanBratanov]

PR Description

Upgrade to gradle 9.7.1 + reviving gradlew.bat

Fixed Issue(s)

N/A

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

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Note

Low Risk
Build-tooling-only wrapper and script changes; the Gradle minor bump could surface plugin or build behavior differences in CI.

Overview
This PR bumps the Gradle wrapper from 9.5.1 to 9.7.1, updating gradle/wrapper/gradle-wrapper.properties (distribution URL and checksum) and refreshing the Unix gradlew script with the matching generated template comments.

It also adds gradlew.bat, so Windows environments can invoke the wrapper via the standard batch entry point instead of relying on Unix-only ./gradlew.

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[lucassaldanha]

My biggest concern with this change is that we wouldn't be exercising the windows "path" frequently, what could lead to them being broken for ages until we figure it out.

The alternative to that would be running them again on CI regularly, but we already know that we don't want that.

So I am not sure what is the best way forward to maintain them.

[zilm13]

My biggest concern with this change is that we wouldn't be exercising the windows "path" frequently, what could lead to them being broken for ages until we figure it out

If we get 0 feedback in this case, it means noone uses it, so it's not a big deal

[StefanBratanov]

I am thinking of giving up on this one and just keeping the change on my local, but can we at keep gradlew.bat. It doesn't hurt being there. I modified the PR.