initial: addressex initial implemmentation

ex/.formatter.exs

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+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

ex/README.md

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+# Addressex
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `addressex` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:addressex, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/addressex>.
+

ex/lib/addressex.ex

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+defmodule Addressex do
+  @moduledoc """
+  Documentation for `Addressex`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> Addressex.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end

ex/mix.exs

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+defmodule Addressex.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :addressex,
+      version: "0.1.0",
+      elixir: "~> 1.16",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:expostal, "~> 0.2.0"}
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end

ex/mix.lock

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+%{
+  "expostal": {:hex, :expostal, "0.2.0", "d78b292f600ab04cb9f62c8dfcce22ea540da1bdd7a99b002030f4f002d1b83c", [:make, :mix], [], "hexpm", "c812b468ce3467b470cd24e3aaa09169a1909266f6ca102fc667da35ca146e38"},
+}

ex/test/addressex_test.exs

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+defmodule AddressexTest do
+  use ExUnit.Case
+  doctest Addressex
+
+  test "greets the world" do
+    assert Addressex.hello() == :world
+  end
+end

ex/test/test_helper.exs

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+ExUnit.start()