Community Wishlist Survey 2022/Expand categories for Miraheze wikis

Proposed by Raidarr

Proposal summary: Expand and deepen the selection of categories that a Miraheze wiki can use upon or after creation

Full proposal: Per discussion that was raised briefly in the last Miraheze Meeting, there would be merit in a) reviewing the current options of wiki subject categories and then b) adding subcategories to them for specificity. The top level would merely indicate the overall scope of the wiki (ie, community or encyclopedia), while the subcategory would define by the wiki's format (a song contest wiki), ideally based on known and currently used flavors. In principle this would be a two-level structure (a general one and then options for being specific in that layout), but I admit more thought is needed as far as the exact options that would be offered. At least, all current ones being compatible + additional options. An ancillary thought to this would be the temporary appointment or election of users who can review the category selection of uncategorized public wikis and sort them into the newly defined lineup, to further the benefits that a revised category structure can offer to WikiDiscover sorting along with the 'profiles' of the wikis at a glance. This strictly pertains to the category field that is selected in wiki request forms or ManageWiki, and in no way would change the substance of the wiki nor would deliberate choices by local administrators/founders be made invalid or different (ie, a subcategory under this thinking would not be required).