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/binding.gyp

@@ -0,0 +1,46 @@
+{
+  "targets": [
+    {
+      "target_name": "gpt4allts", # gpt4all-ts will cause compile error
+      "cflags!": [ "-fno-exceptions" ],
+      "cflags_cc!": [ "-fno-exceptions" ],
+      "include_dirs": [
+        "<!@(node -p \"require('node-addon-api').include\")",
+        "../../gpt4all-backend/llama.cpp/", # need to include llama.cpp because the include paths for examples/common.h include llama.h relatively
+        "../../gpt4all-backend",
+      ],
+      "sources": [ # is there a better way to do this 
+        "../../gpt4all-backend/llama.cpp/examples/common.cpp",
+        "../../gpt4all-backend/llama.cpp/ggml.c",
+        "../../gpt4all-backend/llama.cpp/llama.cpp",
+        "../../gpt4all-backend/utils.cpp", 
+        "../../gpt4all-backend/llmodel_c.cpp",
+        "../../gpt4all-backend/gptj.cpp",
+        "../../gpt4all-backend/llamamodel.cpp",
+        "../../gpt4all-backend/mpt.cpp",
+        "stdcapture.cc",
+        "index.cc",
+       ],
+      "conditions": [
+        ['OS=="mac"', {
+            'defines': [
+                'NAPI_CPP_EXCEPTIONS'
+            ],
+        }],
+        ['OS=="win"', {
+            'defines': [
+                'NAPI_CPP_EXCEPTIONS',
+                "__AVX2__" # allows SIMD: https://discord.com/channels/1076964370942267462/1092290790388150272/1107564673957630023
+            ],
+            "msvs_settings": {
+                "VCCLCompilerTool": {
+                    "AdditionalOptions": [
+                        "/std:c++20",
+                        "/EHsc"
+                    ], 
+                },  
+            },
+        }]
+      ]
+    }]
+}