Implement content-based filtering

[niraymak]

Is your feature request related to a problem? Please describe. Currently we are working on an implementation where recommendation can be found. This works on basis of collaborative filtering. The advise was to start with content-based filtering, but the data was not available yet. There is a issue opened for making data available for content based filtering.

More information about collaborative- and content-based filtering: https://drive.google.com/file/d/10hWY9zGQDwmxQDkl5C6M9_qa5liDhPFH/view?usp=sharing More information about the data research: https://drive.google.com/file/d/1eJN1NbUmIZxGuQaoSAqbZbY3Dxs_5-sj/view?usp=sharing

Describe the solution you'd like Combine the current collaborative filtering implementation: #63 with a new content based filtering into hybrid filtering. Please investigate how you can retrieve most accurate recommendations using content based filtering.

[niraymak]

During an interview with Fontys' GDPR expert concluded was that this way of recommending will not break the GDPR guidelines.