Added plural values to the clothing of Alice, Amy Rose, Annie Leonhart, Arwen, and Asuna

To support forthcoming line functionality that can assess whether an item of clothing sounds plural, each character will need to be updated with a `plural=true` on selected lines in their wardrobe list. If this is not set, the speaker will presume that all items sound singular, unfairly making it look like the *speaker* is the crazy one when things go wrong.

With mod permission, I am going through and updating the xml files of characters who have had no content edits in the past six months. If you were working on an update to any of these characters, feel free to overwrite these changes. However, remember to flag the relevant clothing items as plural in your text document or Character Editor.

As Alice, Amy Rose, Annie Leonhart, Arwen, and Asuna were all made with make_xml, I have rebuilt these behaviour files using their original text documents.