added PageTop component, markdown styles, white background on logo svg, and documentation comments

utils/pageTop.ts

@@ -0,0 +1,16 @@
+/**
+ * Types for PageTop component
+ * @module utils/pageTop
+ */
+
+/**
+ * Interface that defines property for PageTop component
+ * @property {string} text Text to show in top
+ * @property {string} imagePath Path to image used in background
+ */
+interface PageTopProperty {
+    text: string;
+    imagePath: string;
+}
+
+export type { PageTopProperty };