Add "program_usb_timeout=1" entry to bootconfig in order to wait for larger (2TB) SSDs

[oPFGKk9gtuw8nuHkzrQn]

The current setup for Raspberry Pi 4/5 users utilizing USB hard drives larger than 1TB presents a potential issue as found in the source linked here:
https://www.elektronik-kompendium.de/sites/raspberry-pi/2603101.htm

Issue Description:

Users may encounter timeout errors without clear indication of the underlying cause. This can lead to frustration and unnecessary troubleshooting efforts. USB hard drives of 2Tb and larger sizes sometimes take longer to signal readiness to the Raspberry Pi, leading to timeout errors. This issue is exacerbated by the fact that USB ports on the Raspberry Pi only allow 2 seconds for devices to signal readiness, which may not be sufficient for larger hard drives.

Proposed Solution:

Implement a configurable USB timeout extension feature in the Raspiblitz firmware to adjust the timeout period.

Implementation Details:
Introduce a new line in the file "boot/firmware/config.txt" to specify the USB timeout period.

new line:

    # Extend USB Timeout
    program_usb_timeout=1

There is conflicting information out there regarding the actual timeout time and corresponding number. This source seems to be legit and claims, timeout=1 means "add 5 seconds"
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html

[rootzoll]

Adding this towards v1.12.0 because this would be a sd card build change