Added devcontainer specification (#1989)

Author: rameshvarun

.devcontainer/Dockerfile

@@ -0,0 +1,11 @@
+FROM mcr.microsoft.com/devcontainers/python:3.14
+
+# Install GDB
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends gdb \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Switch to non-root user and install Python packages
+USER vscode
+RUN python -m pip install black flake8 tox

.devcontainer/devcontainer.json

@@ -0,0 +1,12 @@
+{
+  "name": "debugpy Development",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  
+  "features": {
+    "ghcr.io/devcontainers/features/git:1": {}
+  },
+
+  "remoteUser": "vscode"
+}