SerperDev Tool: return more data from serper.dev API

[NicoFerna]

The serper.dev API returns a lot of data that is currently ignored by the tool.

When using the Search Tool, it would be nice to have the ability to retrieve peopleAlsoAsk and relatedSearch for example. And depending on the search URLs used, there are keys that might be interesting adding to the response too. Here's a non-exhaustive list:

• date (Search, News...)
• source (News)
• imageUrl (News)
• publicationInfo (Scholar)
• year (Scholar) etc.

[theCyberTech]

@NicoFerna Hi, Just letting you know that this is in progress as we speak, I will let you know once it is improved