Add Portuguese language & Add Cookie info translation

[CarlosNassif]

While using this library, I found a need to use texts in Portuguese. To accomplish it, I've made some changes:

• Create the Portuguese text file with texts translated to Portuguese pt-br.language.ts.
• Create the type TranslatedText;
• Update the NgxCookieConsentComponent by adding dynamic translation using the TranslatedText type;
• Update interfaces and classes to include TranslatedText to the fields:
  • CookieItem interface:
    • name;
    • description;
    • privacyPolicyUrl.
  • CookieDetail interface:
    • description;
    • duration.
  • NgxCookieConsentConfigService class:
    • privacyPolicyUrl;
    • imprintUrl;

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[giacomo]

@CarlosNassif Thank you for PR - i will look at it. Its a huge PR - and there are some things that i want to look closer.

[CarlosNassif]

Thanks, @giacomo! It's the first PR I write to a public lib. Please let me know if there are any adjusts I should do on code structure and logic.