Rework the scripts as maven plugin

Rework the generator.go and validator.go from the scripts directory as kamelet maven plugin to facilitate maintenance and consistency in the project regarding the primary programming language as java.

Start by reading scripts/generator.go and scripts/validator.go to understand the existing generator and validator responsibilities. Then inspect the project’s Maven structure and determine the entry points for a kamelet Maven plugin. Done means the scripts’ required behavior is maintained through a Java-based plugin with consistent project maintenance.

Written by the indexing model from the issue text.