@sriram_1 You can try creating new project and see how the bundle are created using plugins referring to pom.xml, For AEM 6.4.8 you can use any Archetype 24-27 https://github.com/adobe/aem-project-archetype/blob/master/VERSIONS.md
Use this below command to create project
mvn -B archetype:generate -D archetypeGroupId=com.adobe.aem -D archetypeArtifactId=aem-project-archetype -D archetypeVersion=27 -D appTitle="My Project" -D appId="myproject" -D groupId="com.myproject.aem" -D artifactId="myproject-aem-project" -D version="0.0.1-SNAPSHOT" -D aemVersion="6.4.8" -D includeExamples=n
Once done, you can then deploy this project using below command
mvn clean install -PautoInstallPackage
Reference: https://experienceleague.adobe.com/docs/experience-manager-learn/sites/developing/aem-project-archetype.html