update: 增加readme文件内容

README.md

@@ -1,3 +1,25 @@
 # maubot-llmplus
 -------
-maubot plugin: llm plus
+maubot plugin: llm plus
+
+order:
+- !ai info
+> View the configuration information currently in official use.
+- !ai platform list
+> list platforms.
+- !ai platform current
+> query current platform in use.
+- !ai model list
+> list models on current platform.
+- !ai model current
+> query current model in use.
+- !ai use [model_name]
+> switch model in platform, you can use `!ai model list` command query model list.
+- !ai switch [platform_name]
+> switch platform
+> support platforms:
+> - local_ai#ollama
+> - local_ai#lmstudio
+> - openai
+> - anthropic
+