Update cx alias to use new --permission-mode flag (#5233)

The `--allow-dangerously-skip-permissions` flag has been replaced
by `--permission-mode bypassPermissions` in Claude Code.

default/bash/aliases

@@ -44,7 +44,7 @@ alias ....='cd ../../..'
 
 # Tools
 alias c='opencode'
-alias cx='printf "\033[2J\033[3J\033[H" && claude --allow-dangerously-skip-permissions'
+alias cx='printf "\033[2J\033[3J\033[H" && claude --permission-mode bypassPermissions'
 alias d='docker'
 alias r='rails'
 alias t='tmux attach || tmux new -s Work'