add ts alternate to python langchain simplegen

Signed-off-by: Matt Williams <m@technovangelist.com>

examples/.gitignore

+node_modules

examples/with-langchain-typescript-simplegenerate/README.md

+# LangChain
+
+This example is a basic "hello world" of using LangChain with Ollama using NodeJS and Typescript.
+
+## Setup
+
+```
+npm install
+```
+
+## Run
+
+```
+ts-node main.ts
+```
+
+Running this example will print the response for "hello":
+
+```
+Hello! It's nice to meet you. hopefully you are having a great day! Is there something I can help you with or would you like to chat?
+```

examples/with-langchain-typescript-simplegenerate/main.ts

+import { Ollama} from 'langchain/llms/ollama';
+
+async function main() {
+  const ollama = new Ollama({
+    model: 'mistral'    
+    // other parameters can be found at https://js.langchain.com/docs/api/llms_ollama/classes/Ollama
+  })
+  const stream = await ollama.stream("Hello");
+
+  for await (const chunk of stream) {
+    process.stdout.write(chunk);
+  }
+}
+
+main();
\ No newline at end of file

examples/with-langchain-typescript-simplegenerate/package.json

+{
+  "devDependencies": {
+    "typescript": "^5.2.2"
+  },
+  "dependencies": {
+    "langchain": "^0.0.165"
+  }
+}