Commit contains all backend tasks for the eigth sprint.

The focus of sprint 8 was to:

- enhance response text configuration with negative responses
- add interface for dashboard statement requests
- add archive functionality to persist the statement after process
  is finished
- add authorization configuration and rules
- add customerReference and creationDate to statements
- enhance howToBuild and howToRun documentation

Details:

[TOB-292] doc: howToBuild and howToRun

* enhanced the howToBuild and howToRun documentation
* added sections how to build and configure the front end
* added sections how to configure the back end

[TOB-381] fix: dasshboard editedByMe

* fixed logic of the editedByMe boolean of the dashboard statement
  response. Verifies if there's an editLogEntry for the statement
  for the current username.

[TOB-54] feat: archive finished statements

* added archive feature. When finishing a statement a folder with a
  configurable name-templat...