Add skelbiu.lt scraper

[zexa]

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[zexa]

I've touched a part of the skelbiu-lt scraper as seen in #8.

In my mentioned PR you can find a roadmap of sorts in order to call skelbiu-lt version 1.0.0 ready, which I will paste below:

• title
• id
• views
• updated_at
• liked_amount
• description
• location
• quality
• price
• price_change
• images
  • url
  • data
• comments
  • author
  • content
  • created_at
• author
  • image
    • url
    • data
  • created_at
  • contact_phone
  • contact_email
  • is_identity_confirmed
  • listing_amount

[zexa]

One thing that I was thinking about while adding some of the fields is that you often won't want all the data that the scraper can get: i.e. image.data or even image or maybe image.url.

I'll probably end up introducing a concept that allows you to specify which fields are desirable and which fields are not.

Probably in the shape of a Vec<String> that's provided via scrape() and scrape_listing() methods.

I.e. vec!["title", "description", "price"] if you want only the name, description and price.

We will probably add a ScrapingOption<T> struct to communicate which fields were desired and found, which fields were desired but not found and which fields were not desired.

While serializing these fields we will exclude fields that were not desired and show null for those that were.

For now, we will scrape all the fields that we can think of and add all the possible data to a listing.