Add Cryptocurrency Market Analysis example to community gallery

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---

name: Pull Request
about: Create a pull request to contribute to the project
title: 'Add Cryptocurrency Market Analysis Dashboard Example'
labels: 'community example'
assignees: ''

Related Issue
Fixes #N/A (New community example)

Description of Changes
This PR adds a new example, Cryptocurrency Market Analysis Dashboard, to the community_gallery. This interactive dashboard allows users to:

• Analyze cryptocurrency market data from CoinGecko.
• Sort cryptocurrencies based on various criteria (market cap, price, percentage changes).
• Filter data interactively via a slider.
• Visualize trends using scatter plots, bar charts, and line charts.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• New example
• Test improvement

Testing
The dashboard was tested locally using:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have run my code against examples and ensured no errors
• Any dependent changes have been merged and published in downstream modules