Initial enable banking implementation (#382)

* Initial enable banking implementation

* Handle multiple connections

* Amount fixes

* Account type mapping

* Add option to skip accounts

* Update schema.rb

* Transaction fixes

* Provider fixes

* FIX account identifier

* FIX support unlinking

* UI style fixes

* FIX safe redirect and brakeman issue

* FIX

- pagination max fix
- wrap crud in transaction logic

* FIX api uid access

- The Enable Banking API expects the UUID (uid from the API response) to fetch balances/transactions, not the identification_hash

* FIX add new connection

* FIX erb code

* Alert/notice box overflow protection

* Give alert/notification boxes room to grow (3 lines max)

* Add "Enable Banking (beta)" to `/settings/bank_sync`

* Make Enable Banking section collapsible like all others

* Add callback hint to error message

---------

Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

app/views/settings/bank_sync/_provider_link.html.erb

@@ -4,7 +4,8 @@
 <% provider_colors = {
   "Lunch Flow" => "#6471eb",
   "Plaid" => "#4da568",
-  "SimpleFin" => "#e99537"
+  "SimpleFin" => "#e99537",
+  "Enable Banking" => "#6471eb"
 } %>
 <% provider_color = provider_colors[provider_link[:name]] || "#6B7280" %>