User:TakuyaMurata/RfC: Draft classifier

RfC: Draft classifier
Background: This is an implementation of some suggestions made in earlier RfCs and other threads. It has been suggested that it is desirable to have
 * A way to indicate that someone looked at a draft and, although not ready to be moved to the mainspace, the content should be kept; i.e., should be exempted from G13, which essentially is an automatic deletion mechanism for old AfC drafts.
 * A way to sort or rate the drafts by subject, notability or potential encyclopedic value.
 * Some streamlined deletion mechanisms for non-AfC drafts.

Proposal: I propose we use a template that looks like the following to implement the above objectives:

Usage:
 * The template is to be added at the top of a page in the draftspace (not drafts in user pages).
 * "Main" is an automatic link to the page of the same name in the mainspace; the link is typically red but this allows a draft to show up in "what links here". If the link is blue, then that would indicate the draft is a fork.
 * "Notability" can be either "unset", "unlikely", "likely" or "yes". The idea is that setting "notability" = "unlikely" is a diplomatic way to tell a draft is hopeless.
 * "Subject" will be filled using a drop-down menu (apparently that's possible?), using the classification in WikiProject Deletion sorting/Compact. Its initial value will be "unset". The field will be used to create an automatic list of drafts by subject.
 * "G13 applicable" is perhaps most controversial. By default, this field will be "yes" if the draft is an AfC draft and "no" otherwise. But we allow the editors to change that setting. In spirit of "assuming good faith", we ask editors not to indiscriminately change the field to "yes" or "no". Note also that allowing this option represents the extension of G13 to non-AfC drafts; hence, this field should be set "yes" only if the "notability" field is "unlikely".
 * There may be further optional fields such as "merge target".