Clone simulators

[cameroncooke]

When multiple instances of XcodeBuildMCP are running on different workspaces but want to use the same sim identify if target sim is in use and if so create a clone to allow concurrent tasks not to clash.

[yjmeqt]

currently I have more than one iOS project; for each project I may have multiple worktree work in parallel and when developing features like chat; I may may launch two simulator to let then communicate each other, maybe for each sim can give a unique name like ${project}-${branch}-suffix.