chore: add global prettier ignore file

As prettier is not configured for this project, and the style doesn't
meet prettier's opinionated defaults, it's worth dropping this blanket
ignore until such a time (if ever) a prettier config is produced that
matches the styleguide of this project.

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+[*]
+indent_style = tab
+tab_width = 3
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

.prettierignore

@@ -0,0 +1 @@
+*