Add input to form

This change adds a simple input to the form that collects Member
information. I've included a translation in English and in French,
because that happens to be another language I speak!

Author: jonodrew

Diff for: app/views/member/details/edit.html.haml

@@ -11,6 +11,7 @@
         = f.input :surname, required: true
         = f.input :pronouns
         = f.input :email, required: true
+        = f.input :dietary_restrictions, label: t('member.details.edit.dietary_restrictions')
         - if @member.coach?
           = f.input :about_you, as: :text, label: t('member.details.edit.coach.about_you'), input_html: { rows: 3 }, required: true
         - else

Diff for: config/locales/en.yml

@@ -445,6 +445,7 @@ en:
       edit:
         title: Almost there...
         summary: We need some more details from you to finish creating your account. We use these to help run our events.
+        dietary_restrictions: If you have dietary restrictions, please add them here
         coach:
           about_you: What experience do you have? What languages do you like to use? Tell us a little bit about yourself!
         student: