chore: Add some hello world examples

Fixes #203

Signed-off-by: Gordon Smith <[email protected]>

examples/typescript/hello-world/commonjs/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+index.js

examples/typescript/hello-world/commonjs/README.md

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+# Hello World Example - CommonJS
+
+This example shows how to use the `@hpcc-js/wasm` package within a legacy commonjs TypeScript project.
+
+## Steps to build and test
+
+1. Install dependencies
+
+    ```bash
+    npm install
+    ```
+
+2. Build the project
+
+    ```bash
+    npm run build
+    ```
+
+3. Execute in Node
+
+    ```bash
+    node index.js
+    ```
+
+## How this project was created
+
+1. Create a generic typescript project
+
+    ```bash
+    mkdir hello-world
+    cd hello-world
+    npm init -y
+    npm install --save-dev typescript
+    npm install --save @types/node
+    npx tsc --init
+    ```
+
+2. Edit package.json
+
+    ```json
+    {
+        ...
+        "scripts": {
+            "build": "tsc -p tsconfig.json",
+            "test": "npm run build && node ."
+        },
+        ...
+    }
+    ```

examples/typescript/hello-world/commonjs/index.ts

@@ -0,0 +1,7 @@
+async function render() {
+    const { Graphviz } = await import("@hpcc-js/wasm");
+    const graphviz = await Graphviz.load();
+    console.log(graphviz.dot('digraph G { Hello -> World }'));
+}
+
+render();

examples/typescript/hello-world/commonjs/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "commonjs",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "test": "npm run build && node ."
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@hpcc-js/wasm": "^2.15.0"
+  },
+  "devDependencies": {
+    "typescript": "^5.3.3"
+  }
+}