Helidon 5.0 Epic

[tomas-langer]

A high-level list of things that are planned for 5.x of Helidon

Bigger tasks:

• move MP implementation to a separate repository; this must be done, as otherwise we could not follow MP versioning scheme - make sure that git history is kept!
• move Weld repackaging to a separate repository; this is good if we want to run programs, tests from IDE
• refactor all modules builders on @Prototype.Blueprint
• revisit @Feature feature - API to align with other (i.e. @Feature.Aot), descriptor in hson format, using a codegen instead of annotation processor etc.
• introduce Helidon Declarative for all features
• helidon-common-config -> helidon-config-api; remove duplicate interfaces from helidon-config)

Maintenance:

• remove deprecated code
• create upgrade guide