move frontend stuff to its own directory

frontend/src/themes.ts

@@ -0,0 +1,24 @@
+export interface Theme {
+  backgroundColor?: string;
+  backgroundImage?: string;
+  textColor: string;
+}
+
+export const normalTheme: Theme = {
+  backgroundColor: "aliceblue",
+  textColor: "black",
+};
+export const darkTheme: Theme = {
+  backgroundColor: "#444",
+  textColor: "white",
+};
+export const colourTheme: Theme = {
+  backgroundImage:
+    "linear-gradient(45deg, magenta, rebeccapurple, dodgerblue, green)",
+  textColor: "white",
+};
+export const rainbowTheme: Theme = {
+  backgroundImage:
+    "linear-gradient(135deg, #FF0000, #FFA500, #888800, #008000, #0000FF, #4B0082, #800080 ",
+  textColor: "white",
+};