✨ (install.sh, install_nvm.sh): refactor font installation logic to check for existing fonts before downloading, and remove redundant echo statement in install_nvm.sh

zshrc/pyenv.zsh

@@ -0,0 +1,4 @@
+# Initialize pyenv (Python Version Manager)
+export PYENV_ROOT="$HOME/.pyenv"
+[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"  # Add pyenv to PATH
+eval "$(pyenv init - zsh)"  # This loads pyenv