Add icons to whatsapp links

Uses the font awesome 4 WhatsApp icon in .svg format (which is under the
Open Font License) in the pages where an enterprise's WhatsApp number
appears as an hyperlink.

app/assets/javascripts/templates/partials/contact.html.haml

@@ -4,6 +4,7 @@
     %p{"ng-if" => "::enterprise.phone", "ng-bind" => "::enterprise.phone"}
 
     %p{"ng-if" => "::enterprise.whatsapp_phone"}
+      %img{ src: image_path("/map_icons/social-logos/whatsapp.svg") }
       %a{"ng-href" => "{{::enterprise.whatsapp_url}}", target: "_blank", "ng-bind" => "::enterprise.whatsapp_phone"}
 
     %p{"ng-if" => "::enterprise.email_address"}

app/views/producers/_fat.html.haml

@@ -40,6 +40,7 @@
 
       %p.word-wrap{"ng-if" => "::producer.whatsapp_phone"}
         %a{"ng-href" => "{{::producer.whatsapp_url}}", target: "_blank"}
+          %img{ src: image_pack_path("social-logos/whatsapp.svg") }
           %span{"ng-bind" => "::producer.whatsapp_phone"}
 
       %p.word-wrap{"ng-if" => "::producer.email_address"}

app/views/shopping_shared/tabs/_contact.html.haml

@@ -28,6 +28,7 @@
                 %br
               - if current_distributor.whatsapp_phone.present?
                 %a{href: current_distributor.whatsapp_url, target: "_blank" }
+                  %img{ src: image_pack_path("social-logos/whatsapp.svg") }
                   = current_distributor.whatsapp_phone
                   %br
               - if current_distributor.website.present?

app/webpacker/images/social-logos/whatsapp.svg

@@ -0,0 +1,2 @@
+<!--https://icon-sets.iconify.design/fa/whatsapp/-->
+<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" width="0.96em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 1536 1600"><path fill="currentColor" d="M985 878q13 0 97.5 44t89.5 53q2 5 2 15q0 33-17 76q-16 39-71 65.5T984 1158q-57 0-190-62q-98-45-170-118T476 793q-72-107-71-194v-8q3-91 74-158q24-22 52-22q6 0 18 1.5t19 1.5q19 0 26.5 6.5T610 448q8 20 33 88t25 75q0 21-34.5 57.5T599 715q0 7 5 15q34 73 102 137q56 53 151 101q12 7 22 7q15 0 54-48.5t52-48.5zm-203 530q127 0 243.5-50t200.5-134t134-200.5t50-243.5t-50-243.5T1226 336t-200.5-134T782 152t-243.5 50T338 336T204 536.5T154 780q0 203 120 368l-79 233l242-77q158 104 345 104zm0-1382q153 0 292.5 60T1315 247t161 240.5t60 292.5t-60 292.5t-161 240.5t-240.5 161t-292.5 60q-195 0-365-94L0 1574l136-405Q28 991 28 780q0-153 60-292.5T249 247T489.5 86T782 26z"/></svg>

public/map_icons/social-logos/whatsapp.svg

@@ -0,0 +1,2 @@
+<!--https://icon-sets.iconify.design/fa/whatsapp/-->
+<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" width="0.96em" height="1em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 1536 1600"><path fill="currentColor" d="M985 878q13 0 97.5 44t89.5 53q2 5 2 15q0 33-17 76q-16 39-71 65.5T984 1158q-57 0-190-62q-98-45-170-118T476 793q-72-107-71-194v-8q3-91 74-158q24-22 52-22q6 0 18 1.5t19 1.5q19 0 26.5 6.5T610 448q8 20 33 88t25 75q0 21-34.5 57.5T599 715q0 7 5 15q34 73 102 137q56 53 151 101q12 7 22 7q15 0 54-48.5t52-48.5zm-203 530q127 0 243.5-50t200.5-134t134-200.5t50-243.5t-50-243.5T1226 336t-200.5-134T782 152t-243.5 50T338 336T204 536.5T154 780q0 203 120 368l-79 233l242-77q158 104 345 104zm0-1382q153 0 292.5 60T1315 247t161 240.5t60 292.5t-60 292.5t-161 240.5t-240.5 161t-292.5 60q-195 0-365-94L0 1574l136-405Q28 991 28 780q0-153 60-292.5T249 247T489.5 86T782 26z"/></svg>