fix(gitea): 修复 delete-runner API 端点错误

- 修复 delete-runner.md 中的 API 端点从 /api/v1/admin/runners 改为 /api/v1/admin/actions/runners
- 更新 SKILL.md 和 repository-operations.md 文档
- 更新 opencode.json 配置

skill/gitea/delete-runner.md

@@ -69,10 +69,10 @@ LOCAL_MAP=$(mktemp)
 FINAL_LIST=$(mktemp)
 
 # 2.1 Fetch Remote Runners (Try Admin first, then Org)
-# Note: Admin endpoint /api/v1/admin/runners lists all runners
+# Note: Admin endpoint /api/v1/admin/actions/runners lists all runners
 HTTP_CODE=$(curl -s -w "%{http_code}" -o "$REMOTE_LIST" \
     -H "Authorization: token $GITEA_TOKEN" \
-    "${GITEA_URL}/api/v1/admin/runners?page=1&limit=100")
+    "${GITEA_URL}/api/v1/admin/actions/runners?page=1&limit=100")
 
 if [ "$HTTP_CODE" != "200" ]; then
     # Fallback to Org level if defined