refactor: extract helper modules to remove code duplication

lib/mv/helpers/type_parsers.ex

@@ -0,0 +1,49 @@
+defmodule Mv.Helpers.TypeParsers do
+  @moduledoc """
+  Helper functions for parsing various input types to common Elixir types.
+
+  Provides safe parsing functions for common type conversions, especially useful
+  when dealing with form data or external APIs.
+  """
+
+  @doc """
+  Parses various input types to boolean.
+
+  Handles: booleans, strings ("true"/"false"), integers (1/0), and other values (defaults to false).
+
+  ## Parameters
+
+    - `value` - The value to parse (boolean, string, integer, or other)
+
+  ## Returns
+
+    A boolean value
+
+  ## Examples
+
+      iex> parse_boolean(true)
+      true
+
+      iex> parse_boolean("true")
+      true
+
+      iex> parse_boolean("false")
+      false
+
+      iex> parse_boolean(1)
+      true
+
+      iex> parse_boolean(0)
+      false
+
+      iex> parse_boolean(nil)
+      false
+  """
+  @spec parse_boolean(any()) :: boolean()
+  def parse_boolean(value) when is_boolean(value), do: value
+  def parse_boolean("true"), do: true
+  def parse_boolean("false"), do: false
+  def parse_boolean(1), do: true
+  def parse_boolean(0), do: false
+  def parse_boolean(_), do: false
+end