feat(types): typed app config (#4171)

tsconfig.json

@@ -19,6 +19,6 @@
       "@ohif/app": ["platform/app/src"]
     }
   },
-  "include": ["platform/**/src/**/*", "extensions/**/src/**/*", "modes/**/src/**/*"],
+  "include": ["platform/**/src/**/*", "platform/**/public/**/*", "extensions/**/src/**/*", "modes/**/src/**/*"],
   "exclude": ["node_modules", "dist"]
 }