Setup Storybook for testing UI components

This sets up Storybook for testing of React components. It adds stories
for some of the MRVA components. It does not add stories for the main
MRVA views since those are not independent of VSCode and need to be run
from within VSCode.

.vscode/launch.json

@@ -124,6 +124,14 @@
       "outFiles": [
         "${workspaceRoot}/extensions/ql-vscode/out/**/*.js",
       ],
+    },
+    {
+      "name": "Launch Storybook",
+      "type": "node",
+      "request": "launch",
+      "cwd": "${workspaceFolder}/extensions/ql-vscode",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run-script", "storybook"]
     }
   ]
 }