chore: add homepage field to package.json

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: riderx

package.json

@@ -24,6 +24,7 @@
   "bugs": {
     "url": "https://github.com/Cap-go/capacitor-pedometer/issues"
   },
+  "homepage": "https://capgo.app/docs/plugins/pedometer/",
   "keywords": [
     "capacitor",
     "plugin",