Make `initialize-spring-boot-migration` work with simple multi Maven module project

[fabapp2]

Currently, the recipe initialize-spring-boot-migration only works for single module projects.
As a first step to support multi maven module projects this recipe should work with a simple multi module project.

What needs to be done

Setup project

Parent/root module

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example</groupId>
    <artifactId>parent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
    <modules>
        <module>module1</module>
        <module>module2</module>
    </modules>
</project>

Application module

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>parent</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <artifactId>module1</artifactId>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <spring-boot.version>2.7.2</spring-boot.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>module2</artifactId>
            <version>${project.version}</version>
        </dependency>
    </dependencies>
</project>

Component module

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.example</groupId>
        <artifactId>parent</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <artifactId>module2</artifactId>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>

Expected result:

• dependencyManagement section with Spring dependencies should be added to parent pom
• Spring Boot Application class and test should be added to application module
• application.properties should be added to application module
• dependencies should be added to application module

TODOs

• AddDependencies: adds dependencies to topmost application modules. This is oversimplified. The correct module has to be calculated depending on the usage.
• RemoveDependenciesMatchingRegex: Removes dependencies from the modules where AddDependency was applied.
• AddMavenPlugin: Adds the spring-boot-maven-plugin to all application modules
• AddSpringBootApplicationPropertiesAction: Adds application.properties to all application modules
• AddSpringBootMainClassAction: Adds main class to all application modules
• AddSpringBootContextTestClassAction: Adds main class to all application modules
• BuildPackaging: Changes type to jar for application modules
• Make MultiModuleHandler and abstract class providing the setter for Action