* Update model and prep assets

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Add controllers and views

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Add notification badge to signed in component

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Remove redirect parameter from controller

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Add unit tests

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Refactor notifications model and controllers

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Minor fixes from PR review

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Fix availability component test

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Refactor routes.rb

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Refactor notification read_at + PR review fixes

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Additional PR review tweaks

Signed-off-by: Jay Clark <jay@jayeclark.dev>

* Feature flag notifications UI and mark_as_read!

Co-authored-by: Joe Masilotti <joe@masilotti.com>

* Delete notifications when recipient is destroyed

* Add conversation to Notification for easy querying

* Use Heroicons bell icon

* Add admin User and Message/Conversation to seeds

* Get message title from notification instance

* Rework read notifications routing

* This always returns an association

* Link directly to the notification, then redirect

* Simplify queries

* Rework notification dot

* Rework notifications to "belong" to a User

not a Developer or a Business.

* Show the developer's real name when cold messaging

* Not needed; we can current_user.notifications now

* Mark conversation-related notifications as read

* Mark ALL existing notifications as read

* Feature flag marking notifications as read

* /read_notifications -> /notifications/read

* /notifications/read has priority

to avoid conflict with /notifications/:id