docs(README): Fix quick starts examples

[HamadaSalhab]

Closes #872

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Important

Fixes and updates quick start examples in README.md, including search query count, API placeholders, and workflow steps.

• Quick Example:
  • Change number of search queries from 100 to 30.
  • Update api_key and url placeholders in tools section.
  • Modify main workflow steps for clarity and accuracy, including prompt, evaluate, and tool steps.
• Misc:
  • Add num_questions to input_schema.
  • Adjust parallelism from 10 to 5 in web search step.
  • Limit Discord message content to 2000 characters.

^{This description was created by for 7063583. It will automatically update as commits are pushed.}

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1. README.md:349

• Draft comment:
  The type field for the research_wikipedia tool was missing, causing an error. This PR correctly adds type: integration to resolve the issue.
• Reason this comment was not posted:
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