Add i18n files for any texts

Related issues

"Related to #11 (closed) "

Acceptance criteria

• Implemented code changes don't diverge from the related issue.
• Documentation reflects the status quo after merge.
• Version number is incremented according to SemVer. (Snapshot versions are not merged/released.)
• Only released versions of dependencies are used (i.e. no snapshot versions).
• Pipeline still works.
• GitLab issue is up-to-date.

If necessary, the following sections have been updated:

• Readme.md
• Documentation

Proposed squash commit message

Add i18n files for internationalization of all text

• Add i18n files to assect directory.
• Add all text to the en.json and de.json files.
• Add TranslateModule to app.component.ts, app.config.ts, eCMROverview component and test files.
• Add a toogle button to app.component.html
• Add new dependency to enable translation / switching between languages.
• Set english as default language in app.component.ts

Co-authored-by: Lisa Gebel lisa.gebel@iml.fraunhofer.de

Co-authored-by: Till-Philipp Patron till-philipp.patron@iml.fraunhofer.de