Add unit tests for OpenAI plugin and establish coding standards

- Introduced comprehensive unit tests for the OpenAI plugin, covering SSE parsing, sentinel matching, delta extraction, request building, and more.
- Created a new markdown file detailing coding and naming conventions for the dstalk project, including guidelines for comments, naming rules, code organization, and memory management practices.

plugins/CMakeLists.txt

@@ -1,18 +1,18 @@
 # ============================================================
-# 插件目录 — 所有功能插件
+# 插件目录 — 所有功能插件 / Plugin directory — all functional plugins
 # ============================================================
 
-# 基础插件（无外部服务依赖）
+# 基础插件（无依赖） / Base plugins (no dependencies)
 add_subdirectory(config)
 add_subdirectory(file-io)
-add_subdirectory(network)
-
-# 中间插件（依赖基础插件）
-add_subdirectory(session)
-add_subdirectory(context)
-
-# 上层插件（依赖中间插件）
-add_subdirectory(deepseek)
-add_subdirectory(anthropic)
-add_subdirectory(tools)
 add_subdirectory(lsp)
+
+# 依赖基础插件的插件 / Plugins depending on base plugins only
+add_subdirectory(network)      # 依赖 config / depends on config
+add_subdirectory(session)      # 依赖 file_io / depends on file_io
+add_subdirectory(tools)        # 依赖 file_io / depends on file_io
+
+# 依赖其他插件的插件 / Plugins depending on non-base plugins
+add_subdirectory(context)      # 依赖 session / depends on session
+add_subdirectory(openai)       # 依赖 http, config / depends on http, config
+add_subdirectory(anthropic)    # 依赖 http, config / depends on http, config