[LED] Refactor LED handling (#2051)

Refactor LED handling into a library
Use a task instead of relying on the loop for precise timing

Co-authored-by: Florian <1technophile@users.noreply.github.com>

.gitignore

@@ -9,6 +9,7 @@ main/certs/private*
 lib/*
 !lib/esp32-bt-lib
 !lib/TheengsUtils
+!lib/LEDManager
 CMakeLists.txt
 dependencies.lock
 sdkconfig.*