Adds support for retrying failed Task processes

[Badgerati]

Description of the Change

Adds support for being able to either automatically, or manually, retry failed Task processes.

• Add-PodeTask has new -MaxRetries, -RetryDelay, and -AutoRetry parameters. These allow saying how many times to retry a process (default: 0), how many minutes between each retry (default: 0), and where Pode should auto-retry for you.
• A new Restart-PodeTaskProcess function, for retrying failed Task processes. Can be used when -AutoRetry above is not supplied.

Related Issue

Resolves #1405

Examples

# auto-retry up to 3 times, at approx. 1 minute intervals
Add-PodeTask -Name 'Example' -MaxRetries 3 -RetryDelay 1 -AutoRetry -ScriptBlock {
    # do some work
    return $user
}

# allow the task to be retried up to 3 times
Add-PodeTask -Name 'Example' -MaxRetries 3 -ScriptBlock {
    # do some work
    return $user
}

# route to get failed processes, and retry them
Add-PodeRoute -Method Get -Path '/retry-tasks' -ScriptBlock {
    Get-PodeTaskProcess -State Failed | Foreach-Object {
        Restart-PodeTaskProcess -Process $_
    }
}