feat(games): add cloud-empress game package

Transcribe the six core-rulebook chapters into rules/, with every
rollable table extracted into tables/ so the CSVs are the single
source of truth: 21 tables plus the four starting kits under
characters/. Chapters keep only non-dice reference charts and the
age table.

Add eight commands: background, loadout, character, sigil, spell,
mishap, panic, and test (d100 under-roll with advantage and
disadvantage, including the doubles-as-extremes rule).

weather and encounters are package-authored stand-ins for the
setting-book tables; sparks and complication-themes are original.

games/cloud-empress/tables/weather.csv

@@ -0,0 +1,11 @@
+min,max,text,tags
+1,1,"黄云压顶，闷热无风。",clear;heat
+2,2,"云隙间漏下苍白的日光。",clear
+3,3,"酸雨。在户外每待 1 小时承受 1 点伤害，掩体可免。",rain;hazard
+4,4,"浓雾，能见度降到近处。",fog
+5,5,"远处天际传来巨蝉的嗡鸣。",omen;swarm
+6,6,"正午灼热，长途行动前需通过一次躯体豁免。",heat
+7,7,"滑界涟漪——周围的现实被扭曲。",slip
+8,8,"灰雨连绵，衣衫湿透，篝火难以生起。",rain
+9,9,"寒风骤起，气温骤降。",cold
+10,10,"世纪虫群的嗡鸣震动大地，万物噤声。",swarm;omen