Collect programming languages and their percentage per Repository

Add languages and their percentage per Repository and list them in the Repository detail view and aggregated per Institution (in order to find out the programming competence per Institution)
<img width="201" alt="image" src="https://github.com/user-attachments/assets/e474273e-dcb6-448c-86c1-d8ca09de5297">
