* Rename filter to storeid for consistency with other filters
* Greenfield: Add storeId to notification
* Cleanups
* Greenfield: Allow filtering notifications by store id
* Allow overrides on all methods
* Add non-returning SendHttpRequest methods
* Use SendHttpRequest consistently
* Use file-scoped namespace
* Rates: Set default null value for currencyPair
* Ensure it works with instances which have BTCPAY_ROOTPATH set
* GreenField: Notifications API
This refactors notifications so that we dont have a bunch of duplicated direct access to db contexts in controllers and then introduces new endpoints to fetch/toggle seen/remove notifications of the current user.
* add tests + docs
* fix test
* pr changes
* fix permission json
