chore: add rustfmt.toml

rustfmt.toml

@@ -0,0 +1,31 @@
+color                        = "Never"
+condense_wildcard_suffixes   = true
+edition                      = "2021"
+enum_discrim_align_threshold = 99
+fn_single_line               = true
+format_code_in_doc_comments  = false
+format_generated_files       = false
+format_macro_matchers        = true
+format_macro_bodies          = true
+format_strings               = false
+hard_tabs                    = true
+hex_literal_case             = "Lower"
+hide_parse_errors            = true
+imports_indent               = "Visual"
+imports_layout               = "Horizontal"
+imports_granularity          = "Crate"
+newline_style                = "Unix"
+normalize_comments           = true
+normalize_doc_attributes     = false
+overflow_delimited_expr      = true
+reorder_impl_items           = true
+group_imports                = "StdExternalCrate"
+reorder_modules              = true
+struct_field_align_threshold = 99
+tab_spaces                   = 2
+unstable_features            = true
+use_field_init_shorthand     = true
+use_small_heuristics         = "Max"
+use_try_shorthand            = true
+version                      = "Two"
+wrap_comments                = true