added: rustfmt

Author: micutio

rustfmt.toml

@@ -0,0 +1,13 @@
+# Check https://rust-lang.github.io/rustup-components-history/ for
+# latest nightly availability of rls and rustfmt.
+
+# Reference: https://rust-lang.github.io/rustfmt/
+
+# merge_imports = true
+comment_width = 100
+normalize_comments = true
+wrap_comments = true
+enum_discrim_align_threshold = 20
+struct_field_align_threshold = 20
+reorder_impl_items = true
+format_code_in_doc_comments = true