better names for `[GET] /workspace/ws_id/files`'s return type's properties.. `size` instead of `filesize` etc.

add info field to GetFileResponseData interface and display the the additional useful data it can contain

clear webdriver versions before install right one because webdriver can not select the right one from time to time

like here:
```
npx webdriver-manager status
chromedriver versions available: 84.0.4147.105 [last], 87.0.4280.66
```

removed all code concerning workspace-monitor (feature not used anymore or unclear what benefit it is of)

verona-2.1.0-compliant playerConfig - this is not implemented yet anyway

As in verona-player-interface- 2.1.0 requested, the `playerConfig` in `vopReadyNotification` now

* includes `pagingMode`, `stateReportPolicy` and `logPolicy` from bookletConfig

* includes `unitNumber`, `unitTitle`, `unitId`

* it includes also `unitCount`, which is not part of the verona-2.1.0-interface, but proposed here: https://github.com/verona-interfaces/player/issues/24

It is erroring out otherwise.

fixes #221