Add editorconfig

.editorconfig

@@ -0,0 +1,29 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[meson.build]
+indent_size = 2
+tab_size = 2
+indent_style = space
+
+[*.{c,h,c.in,h.in}]
+indent_size = 2
+tab_size = 2
+indent_style = space
+max_line_length = 100
+
+[*.css]
+indent_size = 2
+tab_size = 2
+indent_style = space
+
+[*.{xml,ui}]
+indent_size = 2
+tab_size = 2
+indent_style = space
+