chore: switch task tracker to Gitea issues

Set tracker: gitea in .claude/linear.json so /work and /yolo use this
repo's Gitea issues instead of Linear. Drops the Linear org/team/project
fields (now unused).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude/linear.json

@@ -1,12 +1,12 @@
 {
-  "org": "naps62",
-  "team": "Naps62",
-  "project": "Maestro",
+  "tracker": "gitea",
   "defaultBranch": "main",
   "commitScope": "maestro",
   "remoteHost": "gitea",
   "remoteBaseUrl": "https://git.naps.pt",
-  "contextFiles": ["CLAUDE.md"],
+  "contextFiles": [
+    "CLAUDE.md"
+  ],
   "prReviewers": [],
   "labels": []
 }