Add editorconfig

.editorconfig

@@ -0,0 +1,18 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[{*.rb,*.js,*.ts,*.ex,*.ml}]
+indent_style = space
+indent_size = 2
+
+[{*.rs,*.zig,*.py,*.c,*.cpp,*.h,*.kt,*.sql}]
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab