update test directory

Update README.md

Update README.md for maven configuration openapi codegen plugin

update / renamed package name of Application

feature / update package name in config.json to generate code

feature / add .openapi-generator-ignore to ignore certain code we don't want to generate.

feature / add openapi config options (config.json)

feature / add openapi yaml specification

feature / add openapi generator maven plugin in pom.xml and config that to use external file

feature / add openapi dependency to pom.xml

add / create spring boot 3.2.3 project from start.spring.io

add .gitignore

Initial commit