Add editorconfig to enforce styling consistency

Author: a-rmz

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+trim_trailing_whitespace = true
+
+[{*.go, Makefile}]
+indent_style = tab
+tab_width = 4
+
+[{*.md, *.toml}]
+indent_style = space
+tab_width = 2