[Feature]: add support to use options on translate call and error handling

[mbenatti]

Description

Adds support to use options on translate calls and error handling

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Examples

iex> DeeplEx.translate("Hello man, how are you??", :EN, :PT_BR, %{formality: "less"})
{:ok, "Olá, cara, como você está?"}
iex> DeeplEx.translate("Hello man, how are you??", :EN, :PT_BR, %{formality: "more"})
{:ok, "Olá, senhor, como o senhor está?"}
iex> DeeplEx.translate("Hello man, how are you??", :EN, :PT_BR, %{formality: "invalid"})
{:error, "Invalid request: Value for 'formality' not supported."}

[dustessavdh]

LGTM! Thanks for the pr!