feat(EditorConfig): Add .editorconfig files

.editorconfig

@@ -0,0 +1,13 @@
+# EditorConfig is awesome: https://EditorConfig.org
+# top-most EditorConfig file
+root = true
+
+# Every file
+[*]
+# Unix-style newlines with a newline ending every file
+end_of_line = lf
+# Remove any trailing whitespace characters
+trim_trailing_whitespace = true
+# Ensure every file ends with a newline
+insert_final_newline = true
+