chore: add devcontainer config (#2385)

.devcontainer/Dockerfile

@@ -0,0 +1,8 @@
+# [Choice] Python version (use -bookworm or -bullseye variants on local arm64/Apple Silicon): 3, 3.11, 3.10, 3.9, 3.8, 3-bookworm, 3.11-bookworm, 3.10-bookworm, 3.9-bookworm, 3.8-bookworm, 3-bullseye, 3.11-bullseye, 3.10-bullseye, 3.9-bullseye, 3.8-bullseye, 3-buster, 3.11-buster, 3.10-buster, 3.9-buster, 3.8-buster
+ARG VARIANT=3-bookworm
+FROM python:${VARIANT}
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get purge -y fish
+
+RUN python3 -m pip install --upgrade setuptools cython pip poetry

.devcontainer/devcontainer.json

@@ -0,0 +1,70 @@
+{
+  "name": "litestar-org/litestar",
+  "build": {
+    "dockerfile": "./Dockerfile",
+    "context": "."
+  },
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "installZsh": "true",
+      "username": "vscode",
+      "userUid": "1000",
+      "userGid": "1000",
+      "upgradePackages": "true"
+    },
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers-contrib/features/pre-commit:2": {},
+    "ghcr.io/devcontainers/features/python:1": "none",
+    "ghcr.io/devcontainers/features/git:1": {
+      "version": "latest",
+      "ppa": "false"
+    }
+  },
+  "customizations": {
+    "codespaces": {
+      "openFiles": ["CONTRIBUTING.rst"]
+    },
+    "vscode": {
+      "extensions": [
+        "mhutchie.git-graph",
+        "eamodio.gitlens",
+        "github.vscode-github-actions",
+        "ms-python.black-formatter",
+        "ms-python.mypy-type-checker",
+        "charliermarsh.ruff"
+      ],
+      "settings": {
+        "python.editor.defaultFormatter": "ms-python.black-formatter",
+        "python.defaultInterpreterPath": "${workspaceFolder}/.venv",
+        "python.terminal.activateEnvInCurrentTerminal": true,
+        "python.testing.unittestEnabled": false,
+        "python.testing.pytestEnabled": true,
+        "python.testing.pytestArgs": ["."],
+        "python.terminal.launchArgs": ["-X", "dev"],
+        "terminal.integrated.shell.linux": "/bin/bash",
+        "terminal.integrated.profiles.linux": {
+          "bash": {
+            "path": "bash",
+            "icon": "terminal-bash"
+          },
+          "zsh": {
+            "path": "zsh"
+          },
+          "fish": {
+            "path": "fish"
+          }
+        }
+      }
+    }
+  },
+  "forwardPorts": [8000],
+  "postCreateCommand": [
+    "poetry",
+    "install",
+    "--extras",
+    "full",
+    "--with",
+    "docs,lint"
+  ],
+  "remoteUser": "vscode"
+}