Elixir CI

Add initial support for Zephyr 7b Beta #24

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10 warnings

Logger.warn/1 is deprecated. Use Logger.warning/2 instead

redefining @doc attribute previously set at line 95

variable "callback_fn" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "functions" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "messages" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "zephyr" is unused (if the variable is not meant to be used, prefix it with an underscore)