Make the scan timeout configurable via argument

[z4kn4fein]

Describe the purpose of your pull request

• This PR adds a --timeout argument to the scan command to make the scan operation's 30m timeout configurable.

Related issues (only if applicable)

• Configcat scan - Operation timed out #39

Requirement checklist (only if applicable)

• I have covered the applied changes with automated tests.
• I have executed the full automated test set against my changes.
• I have validated my changes against all supported platform versions.
• I have read and accepted the contribution agreement.