初始化项目，由ModelHub XC社区提供模型

Model: Locutusque/gpt2-xl-conversational
Source: Original Platform

special_tokens_map.json

@@ -0,0 +1,10 @@
+{
+  "additional_special_tokens": [
+    "<|USER|>",
+    "<|ASSISTANT|>"
+  ],
+  "bos_token": "<|endoftext|>",
+  "eos_token": "<|endoftext|>",
+  "pad_token": "[PAD]",
+  "unk_token": "<|endoftext|>"
+}