build(pyproject.toml): add pyyaml to depedencies

.vscode/launch.json

@@ -7,6 +7,7 @@
       "request": "launch",
       "program": "${workspaceFolder}/src/judas_server/__main__.py",
       "console": "integratedTerminal",
+      "cwd": "${workspaceFolder}",
       "justMyCode": true
     }
   ]

pyproject.toml

@@ -14,6 +14,7 @@ dependencies = [
     "flask-login>=0.6.3",
     "flask-socketio>=5.5.1",
     "judas-protocol",
+    "pyyaml>=6.0.3",
 ]
 license = { text = "GPL-3.0+" }