add editorconfig

.editorconfig

@@ -0,0 +1,32 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# Top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Matches all C source files
+[*.c]
+indent_style = tab
+tab_width = 2
+charset = utf-8
+trim_trailing_whitespace = true
+
+# Matches all header files
+[*.h]
+indent_style = tab
+tab_width = 2
+charset = utf-8
+trim_trailing_whitespace = true
+
+# Matches Makefiles
+[Makefile]
+indent_style = tab
+
+# Matches Markdown files
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false