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/invitations/new.html.erb

@@ -1,5 +1,5 @@
 <%= render DS::Dialog.new do |dialog| %>
-  <% dialog.with_header(title: t(".title"), subtitle: t(".subtitle")) %>
+  <% dialog.with_header(title: t(".title"), subtitle: t(".subtitle", product: product_name)) %>
 
   <% dialog.with_body do %>
     <%= styled_form_with model: @invitation, class: "space-y-4", data: { turbo: false } do |form| %>