Add @mailpoet/components package with a dummy testing component

[MAILPOET-5015]

packages/js/components/.gitignore

@@ -0,0 +1,2 @@
+/build
+/build-module

packages/js/components/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@mailpoet/components",
+  "private": true,
+  "sideEffects": false,
+  "version": "0.1.0",
+  "type": "module",
+  "module": "build-module/index.js",
+  "exports": {
+    ".": {
+      "import": "./build-module/index.js"
+    }
+  },
+  "scripts": {
+    "build": "wp-scripts build",
+    "start": "wp-scripts start"
+  },
+  "peerDependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  },
+  "devDependencies": {
+    "@types/react": "18.0.28",
+    "@types/react-dom": "18.0.11",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
+  },
+  "volta": {
+    "extends": "../../../package.json"
+  }
+}

packages/js/components/src/dummy/index.tsx

@@ -0,0 +1,3 @@
+export function Dummy(): JSX.Element {
+  return <div>Dummy component</div>;
+}

packages/js/components/src/index.ts

@@ -0,0 +1 @@
+export * from './dummy';

pnpm-lock.yaml

@@ -363,6 +363,18 @@ importers:
       webpack-manifest-plugin: 5.0.0_webpack@5.74.0
       wp-types: 3.59.1
 
+  packages/js/components:
+    specifiers:
+      '@types/react': 18.0.28
+      '@types/react-dom': 18.0.11
+      react: 18.2.0
+      react-dom: 18.2.0
+    devDependencies:
+      '@types/react': 18.0.28
+      '@types/react-dom': 18.0.11
+      react: 18.2.0
+      react-dom: 18.2.0_react@18.2.0
+
   packages/js/eslint-config:
     specifiers:
       '@babel/eslint-parser': ^7.17.0