code: add editorconfig

Author: ceecko

.editorconfig

@@ -0,0 +1,23 @@
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{yaml,yml}]
+charset = utf-8
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[*.{js,json,ts}]
+charset = utf-8
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[*.{js,ts}]
+block_comment_start = /**
+block_comment = *
+block_comment_end = */