Add .editorconfig

Signed-off-by: Christian König <ckoenig@posteo.de>

.editorconfig

@@ -0,0 +1,25 @@
+# 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
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+
+[*.css]
+indent_style = space
+indent_size = 2
+
+[scripts/**.js]
+indent_style = space
+indent_size = 2
+
+[package.json]
+indent_style = space
+indent_size = 2