[WIP] [FEATURE] added sections and additional informations to xml-template to generate better forms

added sections and additional informations to xml-template to generate better forms:

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation
- [ ] adapted xsd template
- [ ] refactoring template reader
- [ ] adapted cache class generation


__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | no => WIP
| Fixed tickets | none
| Doc           | url to commit