This reverts commit 93e62a4a.
Teststudio does not accept verona 4 specification data

see https://github.com/iqb-berlin/verona-data-specifications/blob/main/responses/manual_iqb-standard.md

The version used does not support the new json-ld format yet and errors
out.

Use verona-module-metadata.json to define json meta data in html header

The version is taken from the package.json file and replaced in the 
html.

Teststudio does not show patch versions.

* Define data version types data versions for `unitDefinition` and
`unitState` in meta tag of index.html
* Separate `MetaDataService` from `VeronaPostService`
* Extend `MetaDataService` to verify data versions of `unitDefinition` and
`unitState`

* Implement `VeronaSubscriptionService` to subscribe to messages from
the host of the player
* Implement `VeronaPostService` to post messages to the host of
the player
* Implement `NativeEventService` to subscribe to events like 'scroll',
'blur' and 'focus'
* Remove js code from wrapper index.html. It is no longer needed.

* The wrapper of the player component listens to the `valueChanged`
event and posts a message to the host of the aspect-player
* Improve code style and remove lint errors

Use `build-player-prod` to build a player version of the
aspect-player which can be used in test-center and test-bed.
The player needs exported unit definitions from the
aspect-editor.

Using scripts also used by the abi player. Aslo adding html wrapper 
files for dev and production. Those have only been modified minimally 
and need to be revised.