chore: sync plugin mirror + dist locally (replicates CI sync-skill)

Verbatim copies of skills/caveman/SKILL.md into the CI-managed
plugins/caveman mirror and rebuilt dist/caveman.skill, matching this
repo's established pattern (bdcba4c) so verify_repo.py is green locally
without waiting on push. CI's sync-skill.yml regenerates these anyway on
merge to main -- this just keeps local main self-consistent in the
meantime, per a T2 review finding (Low, non-blocking).

Author: eggrollofchaos

dist/caveman.skill

@@ -14,7 +14,7 @@ Respond terse like smart caveman. All technical substance stay. Only fluff die.
 
 ACTIVE EVERY RESPONSE. No revert after many turns. No filler drift. Still active if unsure. Off only: "stop caveman" / "normal mode".
 
-Default: **full**. Switch: `/caveman lite|full|ultra|wenyan-lite|wenyan-full|wenyan-ultra|off`.
+Default: **full**. Switch: `/caveman lite|full|ultra|wenyan-lite|wenyan-full|wenyan-ultra|off`. Setting a level scopes it to THIS session only, even if other sessions are on a different level — `/caveman default` reverts this session back to following the shared default.
 
 ## Rules