chore: add devcontainer configuration

.devcontainer/devcontainer.json

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+// 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",
+	"image": "mcr.microsoft.com/devcontainers/python:1-3.12-bullseye",
+	"features": {
+		"ghcr.io/devcontainers-contrib/features/hatch:2": {},
+		"ghcr.io/devcontainers-contrib/features/pre-commit:2": {}
+	},
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "hatch env create",
+	// Configure tool-specific properties.
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"EditorConfig.EditorConfig",
+				"github.vscode-github-actions",
+				"ms-python.python",
+				"redhat.vscode-yaml",
+				"tamasfe.even-better-toml"
+			]
+		}
+	}
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+  - package-ecosystem: "devcontainers"
+    directory: "/"
+    schedule:
+      interval: weekly
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: weekly