zsh-powerlevel10k: add powerlevel9k.zsh-theme to install phase

Signed-off-by: Robert Greener <me@r0bert.dev>

+1
+1
pkgs/shells/zsh/zsh-powerlevel10k/default.nix
··· 40 40 41 41 installPhase = '' 42 42 install -D powerlevel10k.zsh-theme --target-directory=$out/share/zsh-powerlevel10k 43 + install -D powerlevel9k.zsh-theme --target-directory=$out/share/zsh-powerlevel10k 43 44 install -D config/* --target-directory=$out/share/zsh-powerlevel10k/config 44 45 install -D internal/* --target-directory=$out/share/zsh-powerlevel10k/internal 45 46 cp -R gitstatus $out/share/zsh-powerlevel10k/gitstatus