use Gradlew

[milyin]

Fixes #312

[Copilot]

Pull request overview

Adds the Gradle Wrapper to the repository and switches CI/documentation toward using ./gradlew so builds use a pinned, reproducible Gradle version (fixes #312).

Changes:

• Add Gradle Wrapper scripts and wrapper artifacts (gradlew, gradlew.bat, gradle/wrapper/*) pinned to Gradle 8.12.1 with SHA-256 verification.
• Update GitHub Actions workflows to stop installing a system Gradle/version and instead run tasks via ./gradlew.
• Update README to document that the repository ships the Gradle Wrapper.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
gradlew	Adds the POSIX Gradle Wrapper startup script.
gradlew.bat	Adds the Windows Gradle Wrapper startup script.
gradle/wrapper/gradle-wrapper.properties	Pins Gradle distribution URL and checksum for wrapper.
gradle/wrapper/gradle-wrapper.jar	Adds the wrapper runtime JAR required by gradlew.
README.md	Documents wrapper usage and removes “install Gradle” requirement.
.github/workflows/ci.yml	Switches test execution from gradle to ./gradlew and removes explicit gradle-version.
.github/workflows/publish-dokka.yml	Uses ./gradlew dokkaGenerate and removes wrapper-generation steps.
.github/workflows/publish-jvm.yml	Removes explicit Gradle version and wrapper-generation steps (relies on checked-in wrapper).
.github/workflows/publish-android.yml	Removes explicit Gradle version and wrapper-generation steps (relies on checked-in wrapper).

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dl.google.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED -XX:MaxMetaspaceSize=384m -XX:+HeapDumpOnOutOfMemoryError -Xms256m -Xmx512m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)