Add body font doc

doc/installation/StylesDoc.vue

@@ -1,15 +1,17 @@
 <template>
     <DocSectionText v-bind="$attrs">
         <p>Theme, core and icons are the necessary css files of the components, visit the <NuxtLink to="/theming/#themes">Themes</NuxtLink> section for the complete list of available themes to choose from.</p>
+        <DocSectionCode :code="code1" hideToggleCode importCode hideCodeSandbox hideStackBlitz />
+        <p>Each PrimeVue theme has its own font family so it is suggested to apply it to your application for a unified look.</p>
+        <DocSectionCode :code="code2" hideToggleCode importCode hideCodeSandbox hideStackBlitz />
     </DocSectionText>
-    <DocSectionCode :code="code" hideToggleCode importCode hideCodeSandbox hideStackBlitz />
 </template>
 
 <script>
 export default {
     data() {
         return {
-            code: {
+            code1: {
                 basic: `//theme
 import "primevue/resources/themes/lara-light-indigo/theme.css";     
     
@@ -18,6 +20,11 @@ import "primevue/resources/primevue.min.css";
 
 //icons
 import "primeicons/primeicons.css";`
+            },
+            code2: {
+                basic: `body {
+    font-family: (--font-family);
+} `
             }
         };
     }