Point the project at its Gitea repository

Set the manifest's links and code owner to git.asw.io/arne/ha-babytracker.
HACS can only install from GitHub, so the README now leads with a by-hand
install and describes a GitHub mirror for HACS users. Drop the HACS check
from the workflow because it cannot pass on Gitea.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

custom_components/babytracker/manifest.json

@@ -1,12 +1,12 @@
 {
   "domain": "babytracker",
   "name": "Baby Tracker",
-  "codeowners": ["@YOUR_GITHUB_USERNAME"],
+  "codeowners": ["@arne"],
   "config_flow": true,
-  "documentation": "https://github.com/YOUR_GITHUB_USERNAME/babytracker-api",
+  "documentation": "https://git.asw.io/arne/ha-babytracker",
   "integration_type": "service",
   "iot_class": "cloud_polling",
-  "issue_tracker": "https://github.com/YOUR_GITHUB_USERNAME/babytracker-api/issues",
+  "issue_tracker": "https://git.asw.io/arne/ha-babytracker/issues",
   "requirements": ["requests>=2.25"],
   "version": "0.1.0"
 }