refactor: phase 0 & 1

.editorconfig

@@ -0,0 +1,22 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{cpp,hpp,h,c}]
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[*.{json,md}]
+indent_style = space
+indent_size = 2