Add sqlite-viewer extension to devcontainer

Author: kevinbackhouse

.devcontainer/devcontainer.json

@@ -30,7 +30,8 @@
         "redhat.vscode-yaml",
         "GitHub.copilot",
         "GitHub.copilot-chat",
-        "ms-azuretools.vscode-docker"
+        "ms-azuretools.vscode-docker",
+        "qwtel.sqlite-viewer"
       ],
       "settings": {
         "python.useEnvironmentsExtension": true