mopro help command to show instructions

[vivianjeng]

Problem

now there are some messages shown after commends
e.g. mopro init

🚀 Project 'mopro-example-app' initialized successfully! 🎉

To get started, follow these steps:

1. Navigate to your project directory:
   cd mopro-example-app

2. Run the following commands to build and run the project:
   mopro build

📚 To learn more about mopro, visit: https://zkmopro.org

Happy coding! 🚀

but when users clear the terminal or close the terminal, the instructions are gone
and users have to init again or the instructions will not appear again

Details

We can provide a mopro help command (or mopro info, mopro instruct?)
to let users find the instructions again
e.g.

$ mopro help
✔ Comment name (show the instructions)
[ ] mopro init
[ ] mopro build
[ ] mopro create
...

and show the messages again

mopro/cli/src/print.rs

Line 15 in cdc5065

pub(crate) fn print_init_instructions(project_name: String) {

mopro/cli/src/print.rs

Line 31 in cdc5065

pub(crate) fn print_build_success_message() {

mopro/cli/src/print.rs

Line 38 in cdc5065

pub(crate) fn print_create_ios_success_message() {

... and so on

Acceptance criteria

Provide a command to print the helping messages