Fluent Programmatic API to replace faces-config.xml

Currently the `ApplicationConfigurationPopulator` and `@FlowDefinition` just translate the XML config.

Hope there are some Fluent API to simplify Faces config, produces a bean to configure Faces.

```java

@Produces
public FaceConfigBuilderCustomizer cusotmizeFacesConfig(){
return (FaceConfigBuilder builder)-> builder.enableFeatures(EXTENSIONLESS_MAPPING, ...)
.disableFeatures()
.addPhaseListner()
...// configure everything in faces-config.xml and param in web.xml

}

```

Start by reviewing ApplicationConfigurationPopulator and @FlowDefinition to understand how faces-config.xml is currently translated, then compare the settings represented in faces-config.xml and web.xml. Define the scope and design of a fluent configuration API, including how it would configure the listed Faces features and lifecycle settings; done requires an agreed API and corresponding implementation plan.

Written by the indexing model from the issue text.