feat(neovim): improve code generation configuration (#249)

1. Configure local `llm` on `avante`
2. Integrate with `claude-code`
3. Add `serena` `mcp` server

Reviewed-on: #249
Co-authored-by: Joao P Dubas <joao.dubas+gitea@gmail.com>
Co-committed-by: Joao P Dubas <joao.dubas+gitea@gmail.com>

config/mcphub/servers.json

@@ -16,6 +16,14 @@
 		"vectorcode": {
 			"command": "vectorcode-mcp-server",
 			"args": []
+		},
+		"serena": {
+			"command": "uvx",
+			"arg": [
+				"--from",
+				"git+https://github.com/oraios/serena",
+				"serena-mcp-server"
+			]
 		}
 	}
 }