5.0.0-beta.1

• split project into submodules: ktor-openap and ktor-swagger-ui
  • "ktor-openapi" plugin is responsible only for generating and providing an openapi-file
    • no longer install(SwaggerUI) but now install(OpenApi)
    • can be used without the swagger-ui dependency
  • "ktor-swagger" library to provide routes to server swagger-ui for any openapi-file (based on given url)
    • can be used with any openapi file or generator
  • this split allows for more flexibility and new features using openapi-files without swagger-ui (e.g. redoc)
• cleanup package structure, naming, configuration
  • shorter and cleaner package names
  • shorter and more uniform class names
  • slightly simpler configuration dsl
  • made all internal classes actually "internal" -> less namespace pollution