Create option/tool to convert a Vaadin 7/8 declarative file to a Java class with the components and the layouts.

[johannest]

Why?

There is currently no migration path from V7/V8 declarative files to V14+. Basically user's would need to manually rewrite their old V7/V8 designs to Java code first, before they can migrate those to V14+. That would increase the migration time significantly if lot of V7/V8 are used in the legacy application.

How?

Utilize something similar as in this experimental tool: https://github.com/elmot/vaadin-declarative-to-java

What?

Alternatives:

1. Create this as an option to Designer itself
2. Implement it to the vaadin-maven-plugin for V7 and V8.
3. Create separate tool for this.