style: add .editorconfig

.editorconfig

@@ -0,0 +1,19 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[scripts/*]
+shell_variant = bash
+binary_next_line = true
+switch_case_indent = true
+space_redirects = false
+keep_padding = false