Use Hugo for Sass processing (#9404)

* Move all Sass into a common /assets directory

* Remove node-sass make command

* Change head partial to accommodate full Sass rules

* Bump Hugo version in Netlify config

* Use separate partial for CSS imports

* Bump Hugo version

* Remove PostCSS from the pipeline

* Un-bump version

* Update Hugo version to 0.44

* Update Hugo version in Makefile

* Update production Hugo version

* Fix misspelled variable name

* Add ./resources folder to Git

* Update Hugo version in Netlify config to 0.45.1

* Use un-cached css.html partial

* Re-work extra CSS logic for .Params.css

assets/sass/_reset.sass

@@ -0,0 +1,61 @@
+html, body
+	margin: 0
+	padding: 0
+
+
+input, button
+	outline: none
+
+button
+	cursor: pointer
+
+ul, li
+	list-style: none
+
+ul
+	margin: 0
+	padding: 0
+	
+a
+	text-decoration: none
+
+// CONVENIENCE
+.clear
+	display: block
+	clear: both
+
+.light-text
+	color: white
+
+.right
+	float: right
+
+.left
+	float: left
+
+.center
+	text-align: center
+
+
+//mixins
+@mixin fullScreen
+	position: fixed
+	top: 0
+	left: 0
+	width: 100vw
+	height: 100vh
+
+
+@mixin pureCenter($left: 50%, $top: 50%)
+	position: absolute
+	top: $top
+	left: $left
+	transform: translate(-50%, -50%)
+
+
+@mixin maintain-aspect-ratio ($width-factor: 16, $height-factor: 9, $target-width: 80vw, $target-height: 80vh)
+	width: $target-width
+	height: $target-width * ($height-factor / $width-factor)
+	max-width: $target-height * ($width-factor / $height-factor)
+	max-height: $target-height
+