Warn user when sm CLI is not installed

[delattre1]

Implement a user experience enhancement to handle cases where the user tries to run the sm command in the CLI, but the terminal session was opened before ShellMate was installed.

Options:

• Notify the user to open a new terminal session for the command to work.
• Provide a suggestion that the user can copy and paste into their terminal to make the sm command available immediately.

[maryldyer]

On Shellmate's first open we open a new terminal window that way the user can see the walkthrough tips and experience shellmate working properly. If they switch back to a previously open window (I'm making an assumption that we would not know right away that we are going to have a problem) the ux follows the happy path until the user tries to execute a sm command and they get an error. Which is when we would have a special alert banner explaining that we encountered an issue.

I'm open to changing the alert copy if you have a better suggestion!

Figma

[delattre1]

A follow-up fix if put more time into development would be: Show a warning with the source ~/.zshrc or source ~/.bashrc command so the user can manually update their profile.

[delattre1]

When the user runs the command sm 'how can I display a calendar' in the terminal, it triggers both the sm not installed warning and the pro tip: insert suggestion instruction. This overlap causes a conflict in the user experience, where both states are activated simultaneously, potentially confusing the user.

[delattre1]

These are all the warnings implemented in the app:

[delattre1]

New bugs to fix:

Red warning should only show at the terminal window that has the problem. Not at all windows:

Fix padding between 1st pro-tip and the second element when red warning is showing will display without any padding