Switching from CLA to DCO and Migrating to the Reuse Tool (EXPOSUREAPP-3046) #2077

* use Reuse Tool for Copyright and Licenses

* adapt README

* add chnaged open source libraries

* NOTICE and THIRD-PARTY-NOTICE not needed anymore with reuse tool

* add new file to dep5 file for reuse tool

* fix badge info link and add Licensing chapter again

* fix link to license within repo

* fix badge info link

* fix link to license within repo

* add info about the reuse tool and the info link about the repo compliance

* change wording

* adapt year of copyright and add modification staements

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* add license file again to root folder

* adapt copyrights and add gradlew files to dep5 file

* add link to chapter licensing again

* fix links to LICENSE

Co-authored-by: Ralf Gehrer <ralfgehrer@users.noreply.github.com>