Dev: Create .editorconfig file for maintaining consistent coding style.

.editorconfig

@@ -0,0 +1,15 @@
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Matches multiple files with brace expansion notation
+# Set default charset
+[*.{js,rb,html,html.erb,yml,json}]
+charset = utf-8
+indent_style = space
+indent_size = 2