Adopted WP standard block location

Moved blocks into a multi-block folder structure
Added url-loader for static images
Moved CSS to build dir

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "wp-strava-tools",
+  "version": "1.0.0",
+  "license": "GPL-2.0-or-later",
+  "description": "",
+  "main": "build/index.js",
+  "scripts": {
+    "build": "wp-scripts build",
+    "start": "wp-scripts start"
+  },
+  "devDependencies": {
+    "@wordpress/scripts": "6.1.0",
+    "url-loader": "^3.0.0"
+  }
+}