feat: first implementation for issues and pull requests

.chatgpt_config.yaml

@@ -1,3 +1,14 @@
 project_name: "gitea.nvim"
 default_prompt_blocks:
   - "basic-prompt"
+
+preview_changes: false
+interactive_file_selection: false
+partial_acceptance: false
+improved_debug: true
+
+# We rely on token_limit to decide chunk sizes
+token_limit: 128000
+
+# Enable chunking if we exceed the token limit
+enable_chunking: true