feat: add simple devcontainer setup

A devcontainer is a small wrapper around Docker to make it easy to set
up a clean development environment. Most IDE's and code editors support
these now as well as many cloud environments.

I've included a very simple environment to start with which we can
extend as necessary later to streamline the build process.

Author: MJohnson459

.devcontainer/devcontainer.json

@@ -0,0 +1,12 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/python
+{
+  "name": "Python 3",
+  // The cpp image includes python and we need the c++ toolchains to build our dependencies.
+  "image": "mcr.microsoft.com/devcontainers/cpp:ubuntu-24.04",
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {}
+  },
+
+  "postCreateCommand": "apt install python3-gdal"
+}