Keep mise wrappers from writing to stdout (#6940)

mise use -g announces the resolved tool on stdout, so every wrapped command
prepended a "tools:" line to its own output. That corrupts anything speaking a
protocol over stdout, such as codex app-server. Pass --quiet, which keeps errors
on stderr and preserves the exit status.

The obsolete-wrapper check in the agent migration matched the generated command
verbatim, so loosen it to match the package instead of the flags.

Closes #6908

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

migrations/1785846769.sh

@@ -4,6 +4,6 @@ if [[ ! -f $HOME/.local/state/omarchy/preinstalls-removed ]]; then
   omarchy-mise-install github:can1357/oh-my-pi omp
   omarchy-mise-install npm:@xai-official/grok grok
   omarchy-mise-install crush
-elif [[ -f $HOME/.local/bin/omp ]] && grep -Fq 'mise use -g "oh-my-pi"' "$HOME/.local/bin/omp"; then
+elif [[ -f $HOME/.local/bin/omp ]] && grep -Eq 'mise use -g .*"oh-my-pi"' "$HOME/.local/bin/omp"; then
   rm -f "$HOME/.local/bin/omp"
 fi