Spectral install and update

[guylev008]

Description

Install spectral from the extension & auto-update spectral

Motivation and Context

An easier way to install Spectral from the extension will reduce the user's required setup time.
Keeping the agent updated will provide the user with the latest agent update and rules.

How Has This Been Tested?

• Spectral agent doesn't exist -> should display the install button at the start
• Click on install spectral -> should install Spectral agent (display error in the output if failed)
• Last update date doesn't exist -> should update Spectral agent
• Last update date is more than one week -> should update Spectral agent
• Last update date is less than one week -> should not update Spectral agent

Checklist

• Tests
• Documentation
• Linting

[barlesh]

what about the case where we release a spectral version with some issues and we revert the version - the extension will downgrade the version only after a week?

[guylev008]

what about the case where we release a spectral version with some issues and we revert the version - the extension will downgrade the version only after a week?

it can be more than a week, the update occurs only in the extension initialization.
there is no way to know that there was a version upgrade.
maybe later we can add an endpoint to our API that returns the latest version so we can check if an update is needed