Add project level EditorConfig

Author: alerque

.editorconfig

@@ -0,0 +1,37 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+trim_trailing_whitespace = true
+
+[{Makefile*,*.mk}]
+indent_style = tab
+indent_size = 4
+
+[*.md]
+trim_trailing_whitespace = false
+
+[{*.lua,*.rockspec,.luacheckrc}]
+indent_style = space
+indent_size = 3
+max_line_length = 120
+
+# StyLua keys
+collapse_simple_statement = never
+space_after_function_names = definitions
+
+# EmmyLuaCodeStyle keys
+continuation_indent = 6
+quote_style = double,
+call_arg_parentheses = keep,
+trailing_table_separator = always,
+align_call_args = true,
+end_statement_with_semicolon = same_line
+
+[*rockspec]
+max_line_length = 190
+
+[*.rs]
+indent_size = 4