feat: filter issues by the "aider" label in get_issues method

aider_gitea/__main__.py

@@ -74,11 +74,17 @@ class GiteaClient:
         return True
 
     def get_issues(self, owner, repo):
-        """Download issues from the specified repository."""
+        """Download issues from the specified repository and filter those with the aider label."""
         url = f"{self.gitea_url}/repos/{owner}/{repo}/issues"
         response = self.session.get(url)
         response.raise_for_status()
-        return response.json()
+        issues = response.json()
+        # Filter to only include issues marked with the "aider" label.
+        issues = [
+            issue for issue in issues
+            if any(label.get("name") == "aider" for label in issue.get("labels", []))
+        ]
+        return issues
 
     def create_pull_request(self, owner, repo, title, head, base, body):
         """Create a pull request for the given branch."""