Billing (#1269)

* Change env SELF_HOSTING_ENABLED to SELF_HOSTED

* Initial Stripe implementation

* Fix portal link

* Use webhook signatures

* Migrated to new Stripe gem conventions

Also updated resource routing

* Added faraday-multipart gem to resolve middleware notice

* Merge fix

* Merge fix

* Temporary upgrade prompt for early access

* Lint fix

* i18n fixes

* Remove catch-all rescue

* Update .env.example

app/views/pages/dashboard.html.erb

@@ -22,7 +22,9 @@
     </div>
   </header>
 
-  <% if @accounts.empty? %>
+  <% if !Current.family.subscribed? && !self_hosted? %>
+    <%= render "shared/subscribe_prompt" %>
+  <% elsif @accounts.empty? %>
     <%= render "shared/no_account_empty_state" %>
   <% else %>
     <section class="flex gap-4">