wip(growth): fetch|extract|save indicators from WHO

Initial implementation to fetch growth indicators from WHO.

For now, the system merges the measurements for each gender and age
group in a single `csv` file.

The final solution should do this, saving a `dets` file.

mix.exs

@@ -33,6 +33,7 @@ defmodule Wabanex.MixProject do
       {:absinthe_plug, "~> 1.5.0"},
       {:credo, "~> 1.7.0", only: [:dev, :test], runtime: false},
       {:crudry, "~> 2.4.0"},
+      {:decimal, "~> 2.1.0"},
       {:dialyxir, "~> 1.4.0", only: [:dev, :test], runtime: false},
       {:ecto_sql, "~> 3.11.0"},
       {:gettext, "~> 0.24.0"},
@@ -40,6 +41,7 @@ defmodule Wabanex.MixProject do
       {:junit_formatter, "~> 3.4.0", only: [:test]},
       {:lcov_ex, "~> 0.3.0", only: [:dev, :test], runtime: false},
       {:mix_audit, "~> 2.1.0", only: [:dev, :test], runtime: false},
+      {:nimble_csv, "~> 1.2.0"},
       {:pg_ranges, "~> 1.1.0"},
       {:phoenix, "~> 1.7.0"},
       {:phoenix_ecto, "~> 4.6.0"},
@@ -48,9 +50,11 @@ defmodule Wabanex.MixProject do
       {:plug_cowboy, "~> 2.7.0"},
       {:postgrex, "~> 0.18.0"},
       {:prom_ex, "~> 1.9.0"},
+      {:req, "~> 0.5.0"},
       {:sobelow, "~> 0.13", only: [:dev, :test], runtime: false},
       {:telemetry_metrics, "~> 0.6.0"},
-      {:telemetry_poller, "~> 1.1.0"}
+      {:telemetry_poller, "~> 1.1.0"},
+      {:xlsx_reader, "~> 0.8.0"}
     ]
   end