Add Pheix::Addons::Weblog

Add Pheix::Addons::Weblog with basic functionality

Details

Sample integrations is done within the Pheix::Addons::Embedded:

https://gitlab.com/pheix-pool/core-perl6/-/blob/2a32436706e15b102e787f6cbad1be6ad0775234/lib/Pheix/Addons/Embedded/User.rakumod

Other details featuring addons model will be considered during the next milestone: %Release Candidate 1.