Add issue_tracker to the manifest.

This puts a link in the Developer/Info page.

custom_components/tuya_local/manifest.json

@@ -2,6 +2,7 @@
   "domain": "tuya_local",
   "name": "Tuya based devices local control",
   "documentation": "https://github.com/make-all/tuya-local",
+  "issue_tracker": "https://github.com/make-all/tuya-local/issues",
   "dependencies": [],
   "codeowners": [
       "@make-all",