Maven

Hint: I have no idea how to do the libraries part with maven, tips or a PR are welcome.

Add the Jitpack repo if you haven't already:

    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>

For Java sources:

<dependency>
    <groupId>de.itsTyrion</groupId>
    <artifactId>PluginAnnotationProcessor</artifactId>
    <version>1.4</version>
</dependency>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.11.0</version>
            <configuration>
                <source>17</source>
                <target>17</target>
                <!-- Pass the project version as an argument to the compiler -->
                <compilerArgs>
                    <arg>-Aproject.version=${project.version}</arg>
                </compilerArgs>
            </configuration>
        </plugin>
    </plugins>
</build>

For Kotlin sources (I recommend you use Gradle):

(Copied from the docs)
Add an execution of the kapt goal from kotlin-maven-plugin before compile:

<execution>
    <id>kapt</id>
    <goals>
        <goal>kapt</goal> <!-- You can skip the <goals> element
if you enable extensions for the plugin -->
    </goals>
    <configuration>
        <sourceDirs>
            <sourceDir>src/main/kotlin</sourceDir>
            <sourceDir>src/main/java</sourceDir>
        </sourceDirs>
        <annotationProcessorPaths>
            <annotationProcessorPath>
                <groupId>de.itsTyrion</groupId>
                <artifactId>PluginAnnotationProcessor</artifactId>
                <version>1.4</version>
            </annotationProcessorPath>
        </annotationProcessorPaths>
    </configuration>
</execution>