Add blueprints and a navigation bar snippet for generating a primary navigation bar of pages.

blueprints/fields/link-location.yml

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+type: fields
+
+fields:
+  linkLocation:
+    label: Link Location
+    type: select
+    options:
+      type: query
+      query: site.linkLocations.toStructure
+      text: "{{ item.description }}"
+      value: "{{ item.location }}"
+  linkIndex:
+    label: Link Position
+    type: number
+    min: 1
+    default: 10
+  linkText:
+    label: Link Text
+    help: Custom link text to use instead of the title.
+    type: text
+  linkIcon:
+    label: Link Icon
+    help: Font Awesome icon that is used for the link text.
+    type: text

blueprints/fields/link-locations.yml

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+type: fields
+
+fields:
+  linkLocations:
+    label: Link Locations
+    type: structure
+    fields:
+      description:
+        label: Location Description
+        type: text
+        help: A friendly description for selecting this location on pages.
+      location:
+        label: Location Key
+        type: text
+        help: This is what is used when finding links for this location.