moonraker: add .editorconfig file

Developers may use this to help conform to the repo's basic coding style.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

.editorconfig

@@ -0,0 +1,13 @@
+# Editorconfig file for moonraker repo, courtesy of @trevjonez
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+[*.py]
+max_line_length = 80