Adopt Devcontainer for Development Environment (#81)

* chore: add devcontainer setting
* docs: add Dev Container setup instructions to README and create DEVCONTAINER.md

.devcontainer/devcontainer.json

@@ -0,0 +1,41 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/rust
+{
+	"name": "Rust",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/rust:1-1-bullseye",
+	"features": {
+		"ghcr.io/devcontainers/features/node:1": {},
+		"ghcr.io/devcontainers/features/python:1": {
+			"version": "3.10",
+			"toolsToInstall": "uv"
+		}
+	},
+	// Configure tool-specific properties.
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"editor.formatOnSave": true,
+				"[rust]": {
+					"editor.defaultFormatter": "rust-lang.rust-analyzer"
+				}
+			}
+		}
+	},
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "uv venv"
+	// Use 'mounts' to make the cargo cache persistent in a Docker Volume.
+	// "mounts": [
+	// 	{
+	// 		"source": "devcontainer-cargo-cache-${devcontainerId}",
+	// 		"target": "/usr/local/cargo",
+	// 		"type": "volume"
+	// 	}
+	// ]
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+	// 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"
+}