Updating site to use USWDS styles (#509)

* Updated header and footer
* Updated fonts
* Moved files around and updated gulpfile to correct the build process when it goes to production
* Adjusted grid templating
* Added images to assets
* Update app/templates/components/uk_components/footer/template.njk

Co-authored-by: Steven Reilly <stvnrlly@users.noreply.github.com>

app/templates/views/organisations/add-nhs-local-organisation.html

@@ -16,7 +16,7 @@
 {% block maincolumn_content %}
   {{ page_header(page_title) }}
   {% call form_wrapper() %}
-    <p class="govuk-body">
+    <p>
       {{ form.organisations.label.text }}
     </p>
     {{ live_search(

app/templates/views/organisations/organisation/settings/edit-domains.html

@@ -17,7 +17,7 @@
   {{ page_header("Known email domains") }}
   <div class="govuk-grid-row">
     <div class="govuk-grid-column-five-sixths">
-      <p class="govuk-body">
+      <p>
         If a user’s email addresses ends with one of these domains then
         any services they create will be associated with this organization.
       </p>

app/templates/views/organisations/organisation/settings/edit-go-live-notes.html

@@ -17,7 +17,7 @@
   {{ page_header("Edit request to go live notes") }}
   <div class="govuk-grid-row">
     <div class="govuk-grid-column-five-sixths">
-      <p class="govuk-body">
+      <p>
         Text entered here will be displayed in the Zendesk ticket when a service
         belonging to this organization requests to go live.
       </p>

app/templates/views/organisations/organisation/settings/preview-email-branding.html

@@ -9,7 +9,7 @@
 
 {% block maincolumn_content %}
 
-  <h1 class="heading-large">Preview email branding</h1>
+  <h1 class="font-body-2xl margin-bottom-3">Preview email branding</h1>
   <div class="govuk-grid-row">
     <div class="govuk-grid-column-full">
       {{ email_branding_preview(form.branding_style.data) }}