Add .editorconfig file

Most of the go source files

Signed-off-by: Robin Jarry <robin@jarry.cc>

.editorconfig

@@ -0,0 +1,20 @@
+# -*- mode: ini; -*-
+# ex: ft=dosini
+
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+[**.go]
+indent_style = tab
+max_line_length = 100
+tab_width = 4
+
+[Makefile]
+indent_style = tab
+
+[**.scd]
+indent_style = tab