Add prettier support

+ CI to check formatting, and fix the couple of instances that
were not in prettier format (case in HTML clour codes).

package.json

@@ -5,7 +5,9 @@
     "build": "vite build",
     "serve": "vite preview",
     "storybook": "start-storybook -p 6006",
-    "build-storybook": "build-storybook"
+    "build-storybook": "build-storybook",
+    "prettier:check": "prettier -c src",
+    "prettier:format": "prettier -w src"
   },
   "dependencies": {
     "@juggle/resize-observer": "^3.3.1",
@@ -50,6 +52,7 @@
     "@babel/core": "^7.16.5",
     "@storybook/react": "^6.5.0-alpha.5",
     "babel-loader": "^8.2.3",
+    "prettier": "^2.6.2",
     "sass": "^1.42.1",
     "storybook-builder-vite": "^0.1.12",
     "vite": "^2.4.2",