Separate out StatusLED so it can be used for repeater

[andyshinn]

Separates out the StatusLED to its own class so it can be used with repeaters for testing.

[Copilot]

Pull request overview

This PR extracts the status LED blink logic into a reusable StatusLED helper class so it can be used across multiple example applications (including repeater testing), and updates companion radio UIs and the simple repeater example to use it.

Changes:

• Added src/helpers/StatusLED.h encapsulating status LED timing and alert/blink behavior.
• Updated examples/companion_radio (ui-orig and ui-new) to replace inlined LED handler code with StatusLED.
• Updated examples/simple_repeater/main.cpp to optionally initialize and run StatusLED when PIN_STATUS_LED is defined.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/helpers/StatusLED.h	Introduces a reusable status LED blinker/alert helper.
examples/simple_repeater/main.cpp	Wires StatusLED into the repeater example’s setup/loop.
examples/companion_radio/ui-orig/UITask.h	Adds StatusLED member and initializes it when enabled.
examples/companion_radio/ui-orig/UITask.cpp	Removes old LED timing code and uses StatusLED in begin()/loop().
examples/companion_radio/ui-new/UITask.h	Adds StatusLED member and removes old LED state fields.
examples/companion_radio/ui-new/UITask.cpp	Removes old LED handler and uses StatusLED in begin()/loop().

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[Copilot]

millis() rollover isn’t handled safely here: if (now > _next_change) will break after wraparound (~49 days). Use a wrap-safe comparison like (long)(now - _next_change) >= 0 (and keep _next_change as unsigned long) so the blink timing continues working across rollovers (see VolatileRTCClock::tick using unsigned subtraction in src/helpers/ArduinoHelpers.h).

Suggested change

	if (now > _next_change) {
	if ((long)(now - _next_change) >= 0) {