https://github.com/neovim/neovim/wiki/Installing-Neovim

# 1. 可执行文件
sudo cp bin/nvim /usr/local/bin/

# 2. 运行时文件
sudo cp -r share/nvim /usr/local/share/

# 3. man 页面
sudo cp -r man/man1 /usr/local/share/man/man1/

# 4. 其他文件
sudo cp -r share/applications /usr/local/share/
sudo cp -r share/icons /usr/local/share/