Create quant_config.json

The community ofter requests that I add this to all my AWQ quants.
This is also something that TheBloke use to include

quant_config.json

@@ -0,0 +1,6 @@
+{
+  "zero_point": true,
+  "q_group_size": 128,
+  "w_bit": 4,
+  "version": "GEMM"
+}