🧩 Add git blame and Jupyter extensions to the Code Server system

Author: ndebuhr

build/code-server/Dockerfile

@@ -149,4 +149,6 @@ RUN code-server --install-extension bungcip.better-toml && \
     code-server --install-extension redhat.vscode-yaml && \
     code-server --install-extension hashicorp.terraform && \
     code-server --install-extension angular.ng-template && \
-    code-server --install-extension ms-python.python
+    code-server --install-extension ms-python.python && \
+    code-server --install-extension waderyan.gitblame && \
+    code-server --install-extension ms-toolsai.jupyter