Golang bindings initial working version(#534)

* WIP

* Fix includes

* Try to fix linking issues

* Refinements

* allow to load MPT and llama models too

* cleanup, add example, add README

gpt4all-bindings/golang/gpt4all_suite_test.go

@@ -0,0 +1,13 @@
+package gpt4all_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestGPT(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "go-gpt4all-j test suite")
+}