build/chore: Convert FreeRTOS example to meson

Hello_World_FreeRTOS/.cproject

Hello_World_FreeRTOS/.gdbinit

Hello_World_FreeRTOS/.project

Hello_World_FreeRTOS/.settings/language.settings.xml

Hello_World_FreeRTOS/Makefile

Hello_World_FreeRTOS/build_image

hw-tests/hello-freertos/CLI-commands.c

hw-tests/hello-freertos/FreeRTOSConfig.h

hw-tests/hello-freertos/freertos_tickless.c

hw-tests/hello-freertos/main.c

hw-tests/hello-freertos/meson.build

hw-tests/meson.build

lib/sdk/Libraries/FreeRTOS/meson.build

lib/sdk/meson.build