feat(config): Customize text editors

Signed-off-by: Valentin Popov <info@valentineus.link>

.editorconfig

@@ -0,0 +1,20 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.scss]
+indent_size = 2
+indent_style = space
+
+[*.yml]
+indent_size = 2
+indent_style = space
+
+[{Gemfile,.*}]
+indent_style = tab