Improve document to unify lisa command

[squirrelsc]

We want windows/linux users use the same command to start lisa. It helps to simplify the document and experience. The arguments are easy to adopt, but the start command is a little challenge. The Windows command is lisa.cmd, which can be used like lisa. The Linux command is lisa.sh cannot be started by lisa. Because our code folder called lisa, it's conflict. Current solution is to ask user to add an alias, and some Linux users thought it's a invasion way. We need to think about how to support it better.
The quick solution is to ask user replace lisa to lias.sh in any command. Long term, we need to install the command to Python for users.