chore: add encoding config to prevent Chinese garbled text (.editorconfig, .gitattributes)

.editorconfig

@@ -0,0 +1,33 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# 顶级配置文件
+root = true
+
+# 所有文件的默认设置
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# TypeScript/JavaScript 文件
+[*.{ts,tsx,js,jsx}]
+indent_style = space
+indent_size = 2
+
+# JSON 文件
+[*.json]
+indent_style = space
+indent_size = 2
+
+# Markdown 文件（不删除行尾空格，因为两个空格代表换行）
+[*.md]
+trim_trailing_whitespace = false
+
+# YAML 文件
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+
+