Make branding configurable (#173)

* Remove orphan function

* Add centralized branding helpers and update locales

* Remove _plus and add (proper) brand

* No longer Sure, configurable

* Consistency with compose file naming

* Missed `product_name` mapping

* Fix brand/product name in mailers

* Product name in email reset flow

* Fix i18n errors/tests

* Fix password mailer brand/product name (again)

* Missed hardcoded `Sure` in onboarding goals

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Signed-off-by: Juan José Mata <jjmata@jjmata.com>

* PR nitpick on documentation

* Missing interpolation key for invited UI

* Orphan assets

* New logos

---------

Signed-off-by: Juan José Mata <jjmata@jjmata.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

app/views/pages/feedback.html.erb

@@ -16,7 +16,7 @@
 
     <%= link_to "https://discord.gg/36ZGBsxYEK", target: "_blank", rel: "noopener noreferrer", class: "w-full md:w-1/3 flex flex-col items-center p-4 border border-alpha-black-25 rounded-xl hover:bg-container-hover" do %>
       <%= image_tag "discord-icon.svg", class: "w-8 h-8 mb-2" %>
-      <span class="text-sm font-medium text-primary text-center">Discuss Sure with others</span>
+      <span class="text-sm font-medium text-primary text-center">Discuss <%= product_name %> with others</span>
     <% end %>
   </div>
 </div>