Cava Module (#662)

* First version of the cava module

* Update cava stuff

* Update themes for cava

* Update themes

* Handle cava visibility when null

* Add bar characters in options

---------

Co-authored-by: Ed Bennett <ed@dodimead.com>
Co-authored-by: Jas Singh <jaskiratpal.singh@outlook.com>

src/scss/style/bar/style.scss

@@ -448,3 +448,30 @@
     // custom font size
     1.075em //
 );
+
+/*
+ * #################################
+ * #       Cava Styling            #
+ * #################################
+ */
+@include styleModule(
+    //
+    // class name
+    'cava',
+    // label color
+    $bar-buttons-modules-cava-text,
+    // icon color
+    $bar-buttons-modules-cava-icon,
+    // icon background if split style is used
+    $bar-buttons-modules-cava-icon_background,
+    // label background
+    $bar-buttons-modules-cava-background,
+    // inner spacing
+    $bar-buttons-modules-cava-spacing,
+    // if border enabled
+    $bar-buttons-modules-cava-enableBorder,
+    // border color
+    $bar-buttons-modules-cava-border,
+    // custom font size
+    1.2em //
+);