fix: re-enable add udev rule functionality

[robberwick]

This pull request includes changes to the src/scripts/main.py file to re-enable the --add-udev-rule functionality in the blinkstick cli tool, and improve the clarity of help messages. The most important changes include updating the help text for the --add-udev-rule option and reordering the logic for finding BlinkStick devices based on serial numbers.

Improvements to help messages:

• Updated the help text for the --add-udev-rule option to include an example command for running it with root permissions.

Code reorganization:

• Moved the logic for adding the udev rule to a more appropriate location in the main function, ensuring it is executed before any actions which require finding BlinkStick devices

[Copilot]

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

[Copilot]

The error message incorrectly references 'options.backend' instead of 'options.serial'. Please update the variable to correctly reflect the intended serial number usage.

Suggested change

	print("BlinkStick with serial number " + options.backend + " not found...")
	print("BlinkStick with serial number " + options.serial + " not found...")

[Copilot]

Copilot reviewed 1 out of 1 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/scripts/main.py:307

• The error message now correctly uses options.serial instead of the previously incorrect options.backend. Please confirm that all references to the old variable have been updated.

print("BlinkStick with serial number " + options.serial + " not found...")

src/scripts/main.py:280

• When both --add-udev-rule and a serial filter are provided, the udev branch will be executed and the device search skipped. Please verify that this behavior is intended and clearly documented in the help messages.

if options.udev: