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>

config/locales/defaults/en.yml

@@ -1,5 +1,8 @@
 ---
 en:
+  defaults:
+    brand_name: "%{brand_name}"
+    product_name: "%{product_name}"
   activerecord:
     errors:
       messages:

config/locales/defaults/nb.yml

@@ -1,5 +1,8 @@
 ---
 nb:
+  defaults:
+    brand_name: "%{brand_name}"
+    product_name: "%{product_name}"
   activerecord:
     errors:
       messages:

config/locales/defaults/tr.yml

@@ -1,5 +1,8 @@
 ---
 tr:
+  defaults:
+    brand_name: "%{brand_name}"
+    product_name: "%{product_name}"
   activerecord:
     errors:
       messages: