make platformio.ini even more modular

arch/stm32/stm32wl5e.ini

@@ -0,0 +1,19 @@
+[stm32wl5e_base]
+platform = ststm32
+board = generic_wl5e
+framework = arduino
+build_type = debug
+build_flags = 
+  ${arduino_base.build_flags}
+  -Isrc/platform/stm32wl -g
+  -DHAL_SUBGHZ_MODULE_ENABLED
+#  Arduino/PlatformIO framework-arduinoststm32 package does not presently have SUBGHZSPI support
+#  -DPIN_SPI_MOSI=PINSUBGHZSPIMOSI -DPIN_SPI_MISO=PINSUBGHZSPIMISO -DPIN_SPI_SCK=PINSUBGHZSPISCK
+build_src_filter = 
+  ${arduino_base.build_src_filter} -<platform/esp32/> -<nimble/> -<mesh/wifi/> -<mesh/http/> -<modules/esp32> -<mqtt/> -<graphics> -<input> -<buzz> -<modules/Telemetry> -<platform/nrf52> -<platform/portduino> -<platform/rp2040>
+lib_deps =
+  ${env.lib_deps}
+  https://github.com/jgromes/RadioLib.git
+  https://github.com/kokke/tiny-AES-c.git
+lib_ignore = 
+  mathertel/OneButton@^2.0.3