- Rollback of cache keys for backup_feature_flags and feature_flags t…

…o use underscores instead of : to make them PSR6 compliant.

- Added the API key in the cache key for analytics in order to allow keeping multiple environment cache keys in the same cache.

- Created the public register() method for Event Tracking.

- Added flexibility to the Cache implementation to allow Redis adapter properly.
- Analytics cache and backup cache now use the same cache implementation than the regular feature flag cache instead of local filesystem.

Removed automatic person tracking and created a public method to do s…

…o manually.

Updated the documentation and optimized the event tracking to avoid u…

…nnecessary server calls.

Added new Event and People Tracking Module.

Added support for the "Is contained in" string operator.

Removed dependency from laminas-cache and migrated to symfony/cache

Fix to remove analytics cache file from repository

* Fixed a problem with git and a cache file that remained in the repository

Feature/feature usage analytics module (#1)

First implementation of the Feature Usage Analytics Module.

Fixed interference between cache and backup on the Cache strategy