Matomo (Piwik) analytics provider as alternative to google analytics

To goal is to add an alternative to the google analytics plugin with the same functionality. Matomo (Piwik) is a (free) alternative product with similar functionality than the google counterpart. Other than google, Matomo can be run on premises in a self-hosted setup.

Todo:

• Implement a MatomoAnalyticsSPI based on the AnalyticsSPI interface
• Add config UI to configure the Matomo server address, ID and whatever is needed
• Adapt the Content-Security-Policy to automatically include the configured Matomo domain as a "trusted domain"

frentix internal: CL-948