Search wikipedia tool

[Zevleg]

Ticket Implement search wikipedia in React Agent

This is the implementation of search Wikipedia with ReActAgent. As WikipediaClient have 3 functions with diferent params, I created a new ToolWikipedia Interface because if I implement Tool interface I must to implement the function invoke only with one parameter.

Also I created ToolMain interface, where Tool and ToolWikipedia implements ToolMain and it is declared in ReActAgent to choose wich invoke function run for each tool with when(tool) like this:

val observation: String? =
    when (tool) {
      is ToolWikipedia -> tool.invoke(plan.toolInput, null, null)
      is Tool -> tool.invoke(plan.toolInput)
      else -> null
    }

[raulraja]

Thanks, @Zevleg; looks excellent.
We should consider not to hardcode the Wikipedia tool inside the agent checks and instead provide three tools as outlined in my comment. We can't make exceptional cases for each tool, and the agents should work under a single common interface agnostic to the tools.
One of the reasons is that tools files and types may not live in this module but instead on a Wikipedia-specific module down the road.

[raulraja]

Looks great, thanks @Zevleg !

[raulraja]

thank you @Zevleg 👏