Migrate Jade to Pug template engine

Jade templates engine has been renamed to Pug.

We are using Pug already on the Blender Cloud repository, following is Flamenco and Attract

src/templates/projects/home_index.pug

@@ -0,0 +1,43 @@
+| {% extends 'projects/home_layout.html' %}
+| {% set subtab = 'blender_sync' %}
+| {% set learn_more_btn_url = '/blog/introducing-blender-sync' %}
+| {% block currenttab %}
+section.nav-tabs__tab.active#tab-blender_sync
+	.tab_header-container
+		.tab_header-intro(
+			style="background-image: url({{ url_for('static', filename='assets/img/backgrounds/pattern_01.jpg')}})")
+			.tab_header-intro_text
+				h2 Connect Blender with the Cloud
+				p
+					| Save your Blender preferences once, load them anywhere.
+					<br/>
+					| Use the
+					=' '
+					a(href='https://cloud.blender.org/r/downloads/blender_cloud-latest-bundle.zip') Blender Cloud add-on
+					=' '
+					| to synchronise your settings from within Blender.
+			.tab_header-intro_icons
+				i.pi-blender
+				i.pi-heart-filled
+				i.pi-blender-cloud
+
+		| {% for version in synced_versions %}
+		.blender_sync-main
+			.blender_sync-main-header
+				h2.blender_sync-main-title
+					i.pi-blender
+					| Blender {{ version.version }}
+				.blender_sync-main-last
+					| Last synced on: {{ version.date|pretty_date }}
+		| {% else %}
+		.blender_sync-main.empty
+			.blender_sync-main-header
+				span.blender_sync-main-title
+					| No settings synced yet
+					<hr/>
+					a.download(
+						href='https://cloud.blender.org/r/downloads/blender_cloud-latest-bundle.zip')
+						| Download add-on
+		| {% endfor %}
+| {% endblock %}
+