chore(init): bootstrap project with npm and quality tools

- setup vscode .devcontainer
- init with npm
- add dev dependencies: typescript, eslint, prettier,
commitlint

.devcontainer/Dockerfile

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+ARG VARIANT="16-bullseye"
+FROM node:${VARIANT}
+
+RUN npm install -g npm@latest

.devcontainer/devcontainer.json

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+{
+  "name": "astro-i18next",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "args": {
+      "VARIANT": "16-bullseye"
+    }
+  },
+
+  // Set *default* container specific settings.json values on container create.
+  "settings": {
+    "terminal.integrated.defaultProfile.linux": "bash",
+    "editor.formatOnSave": true,
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+
+  // Add the IDs of extensions you want installed when the container is created.
+  "extensions": [
+    "astro-build.astro-vscode",
+    "DavidAnson.vscode-markdownlint",
+    "dbaeumer.vscode-eslint",
+    "eamodio.gitlens",
+    "esbenp.prettier-vscode",
+    "pflannery.vscode-versionlens",
+    "streetsidesoftware.code-spell-checker",
+    "wayou.vscode-todo-highlight",
+    "yzhang.markdown-all-in-one"
+  ],
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  // "forwardPorts": [],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "npm install",
+
+  // Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  "features": {
+    "git": "latest"
+  }
+}

.eslintrc.json

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+{
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "standard"
+    ],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        "sourceType": "module"
+    },
+    "plugins": [
+        "@typescript-eslint"
+    ],
+    "rules": {
+    }
+}

.gitignore

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+# build output
+dist
+
+# dependencies
+node_modules/
+
+# logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# macOS-specific files
+.DS_Store
+
+# cache
+.eslintcache

.husky/.gitignore

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+_

.husky/commit-msg

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+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx --no-install commitlint --verbose --edit "$1"

.husky/pre-commit

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+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx lint-staged

.prettierrc.json

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+{
+  "trailingComma": "es5",
+  "overrides": [
+    {
+      "files": "*.md",
+      "options": {
+        "proseWrap": "always"
+      }
+    }
+  ]
+}

README.md

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+# astro-i18next
+
+Astro components for i18next.

commitlint.config.js

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+module.exports = { extends: ['@commitlint/config-conventional'] }