chore: 新增 .editorconfig 和 .prettierrc 配置檔以統一代碼風格

Author: c-c-epr

.editorconfig

@@ -0,0 +1,10 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "printWidth": 100,
+  "singleQuote": false,
+  "semi": true,
+  "tabWidth": 2,
+  "useTabs": false,
+  "trailingComma": "all"
+}