Added Search Feature for Event

[patela22]

Description

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Checklist

• I have performed a self-review of my code
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• New and existing unit tests pass locally with my changes

[Copilot]

Pull Request Overview

This PR adds a search functionality for events that allows filtering and sorting by various criteria. The implementation includes new search fields in the event schema and a comprehensive search API endpoint.

Key changes:

• Added optional search-related fields to event schemas (description, keywords, age_min, age_max)
• Implemented search_events method in EventModel with filtering, sorting, and pagination
• Created new /search endpoint for querying events with multiple search criteria

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
app/schemas/event.py	Added optional fields for search functionality (description, keywords, age constraints)
app/models/event.py	Implemented search_events method with MongoDB queries for filtering and pagination
app/api/endpoints/event.py	Added search endpoint with query parameters for filtering and sorting events

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