Clone configuration into new tmux session

[kenwarner]

I'd love to be able to do something like this

tmuxp clone myconfig -s newsession

which basically reads the config yaml myconfig, creates a new tmux session named newsession and loads myconfig into it. thoughts?

[kenwarner]

for POC sake I just added it to the existing tmuxp load command

tmuxp load myconfig -s newsession

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