nodejs bindings (#602)

* chore: boilerplate, refactor in future

* chore: boilerplate

* feat: can compile succesfully

* document .gyp file

* add src, test and fix gyp

* progress on prompting and some helper methods

* add destructor and basic prompting work, prepare download function

* download function done

* download function edits and adding documentation

* fix bindings memory issue and add tests and specs

* add more documentation and readme

* add npmignore

* Update README.md

Signed-off-by: Jacob Nguyen <76754747+jacoobes@users.noreply.github.com>

* Update package.json - redundant scripts

Signed-off-by: Jacob Nguyen <76754747+jacoobes@users.noreply.github.com>

---------

Signed-off-by: Jacob Nguyen <76754747+jacoobes@users.noreply.github.com>

gpt4all-bindings/typescript/spec/index.mjs

@@ -0,0 +1,32 @@
+import { LLModel, prompt, createCompletion } from '../src/gpt4all.js'
+
+
+
+const ll = new LLModel("./ggml-vicuna-7b-1.1-q4_2.bin");
+
+
+try {
+   class Extended extends LLModel {
+        
+   }
+} catch(e) {
+    console.log("Extending from native class gone wrong " + e)
+}
+
+console.log("state size " + ll.stateSize())
+
+console.log("thread count " + ll.threadCount());
+ll.setThreadCount(5);
+console.log("thread count " + ll.threadCount());
+ll.setThreadCount(4);
+console.log("thread count " + ll.threadCount());
+
+
+console.log(createCompletion(
+    ll,
+    prompt`${"header"} ${"prompt"}`, {
+        verbose: true,
+        prompt: 'hello! Say something thought provoking.'
+    }
+));
+