Add support for LN882X Family (with LibreTiny) (#8954)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

platformio.ini

@@ -4,7 +4,7 @@
 ; It's *not* used during runtime.
 
 [platformio]
-default_envs = esp8266-arduino, esp32-arduino, esp32-idf, bk72xx-arduino
+default_envs = esp8266-arduino, esp32-arduino, esp32-idf, bk72xx-arduino, ln882h-arduino
 ; Ideally, we want src_dir to be the root directory of the repository, to mimic the runtime build
 ; environment as best as possible. Unfortunately, the ESP-IDF toolchain really doesn't like this
 ; being the root directory. Instead, set esphome/ as the source directory, all our sources are in
@@ -530,6 +530,17 @@ build_flags =
 build_unflags =
     ${common.build_unflags}
 
+[env:ln882h-arduino]
+extends = common:libretiny-arduino
+board = generic-ln882hki
+build_flags =
+    ${common:libretiny-arduino.build_flags}
+    ${flags:runtime.build_flags}
+    -DUSE_LN882X
+    -DUSE_LIBRETINY_VARIANT_LN882H
+build_unflags =
+    ${common.build_unflags}
+
 [env:rtl87xxb-arduino]
 extends = common:libretiny-arduino
 board = generic-rtl8710bn-2mb-788k