Watermark implications

BUR #34541 is pending approval.

create implication miyoushe_watermark -> watermark
create implication weibo_watermark -> watermark
create implication xiaohongshu_watermark -> watermark

Self-explanatory.

BUR #34907 is pending approval.

nuke miyoushe_watermark
nuke xiaohongshu_watermark
nuke skland_watermark

I've previously elaborated at forum #322575 but there's no point in us having these hyperspecific Chinese site watermarks so proposing the alternative of getting rid of them. These aren't useful to have and we don't treat any other site's unique watermarks any differently than just the plain old watermark tag.

I am not proposing any change to Weibo watermark in this BUR specifically because of topic #29819.

BUR #35179 is pending approval.

create alias miyoushe_watermark -> miyoushe_logo
create alias xiaohongshu_watermark -> xiaohongshu_logo
create alias skland_watermark -> skland_logo

Alternate BUR proposal based on what's been mentioned above.

BUR #35201 is pending approval.

create alias xiaohongshu_watermark -> website_watermark
create alias miyoushe_watermark -> website_watermark
create alias weibo_watermark -> website_watermark
create alias skland_watermark -> website_watermark
create implication website_watermark -> watermark

my proposal. conflates all four currently existing tags for watermarks of specific sites into one, and implies it to the main watermark tag.