Add devcontainer with Python 3.13 and uv support

Adds a Dockerfile-based development container using Microsoft's Python 3.13 image, with uv installed for dependency management.

Updates:
- Adds .devcontainer/Dockerfile based on Python 3.13
- Modifies devcontainer.json to use a local build
- Updates on-create-command.sh to install dependencies using uv

.devcontainer/on-create-command.sh

@@ -1,7 +1,15 @@
 #!/bin/bash
 set -e
+
+# Create a virtual environment and upgrade pip/setuptools/wheel
 python3 -m venv --upgrade-deps .venv
 . .venv/bin/activate
-pip install -r requirements/dev.txt
-pip install -e .
-pre-commit install --install-hooks
+
+# uv is already available (installed via Dockerfile). Use uv to install:
+# 1) the project in editable mode
+# 2) all dev dependencies (from pyproject.toml [project.optional-dependencies])
+uv pip install --editable . --group dev
+
+
+# Set up pre-commit hooks
+pre-commit install