add: .editorconfig

Author: dev-satoshi

.editorconfig

@@ -0,0 +1,30 @@
+# 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
+
+[*.md]
+indent_style = space
+trim_trailing_whitespace = false
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[Makefile,makefile]
+indent_style = tab
+tab_width = 4
+
+[*.sh]
+indent_style = space
+indent_size = 2