how to start a hilla project on an arleady finished vaadin Project

Pretty much the title, i have a Vaadin-SpringBoot project already fit with the frontend in vaadin.
My goal is to install Hilla and try React or Lit.
how could i do that?

I have looked in the documentation all i could found is how to start a Hilla project from scratch that would not do because we already have all the spring application up and running, we just want to experiment with the frontEnd a little.

is it possibile?

This is my pom so far:
`<repositories>
<!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->

    <!-- Main Maven repository -->
<repository>
<id>central</id>
<url>https://repo.maven.apache.org/maven2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>vaadin-prereleases</id>
<url>
https://maven.vaadin.com/vaadin-prereleases/
</url>
</repository>
<!-- Repository used by many Vaadin add-ons -->
<repository>
<id>Vaadin Directory</id>
<url>https://maven.vaadin.com/vaadin-addons</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->
<pluginRepository>
<id>central</id>
<url>https://repo.maven.apache.org/maven2</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>vaadin-prereleases</id>
<url>
https://maven.vaadin.com/vaadin-prereleases/
</url>
</pluginRepository>
</pluginRepositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<!-- Replace artifactId with vaadin-core to use only free components -->
<artifactId>vaadin</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!-- ###################### DRIVER ####################### -->
<!--
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql5.version}</version>
<!--<scope>runtime</scope>-->
</dependency>   
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<version>${sqlserver.version}</version>
</dependency>
<!-- ############################################## -->
<!-- TOMCAT BOOT -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- spring framework -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-testbench</artifactId>
<scope>test</scope>
</dependency>
<!-- Include JUnit 4 support for TestBench and others -->
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.github.bonigarcia</groupId>
<artifactId>webdrivermanager</artifactId>
<version>5.1.1</version>
<scope>test</scope>
</dependency>`

Thanks for the time you given me i really need some help

If you have a fairly recent Vaadin application you should be able to add Hilla dependencies in your pom.xml.

Add the version into <properties> section. This helps you to change the version later:

<hilla.version>2.1.0</hilla.version>

In the <dependencyManagement> section add the "bill of material":

<dependency>
<groupId>dev.hilla</groupId>
<artifactId>hilla-bom</artifactId>
<version>${hilla.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>

Now you can include actual Hilla dependency in <dependencies> using:

<dependency>
<groupId>dev.hilla</groupId>
<artifactId>hilla</artifactId>
</dependency>

Last thing is to add the plugin into <build> > <plugins> section:

<plugin>
<groupId>dev.hilla</groupId>
<artifactId>hilla-maven-plugin</artifactId>
<version>${hilla.version}</version>
<executions>
<execution>
<goals>
<goal>prepare-frontend</goal>
</goals>
</execution>
</executions>
</plugin>

Here is an example from start.vaadin.com you can use for a starting point, if you want to starts from scratch or browse the source code.