Add Wallhaven project to README

[federicotorrielli]

Adding Wallhaven script to the repo. Wallhaven is desktop changer and wallhaven downloader for Linux, KISS style.

Motivation and Context

None.

How Has This Been Tested?

Tested on CachyOS, rolling. Gnome.

Types of changes

• 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 change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Summary by Sourcery

Documentation:

• Include Wallhaven script with description and GitHub link in the README's list of internet tools

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR updates the project README by adding a new entry for the Wallhaven script under the Internet section, including its oss badge, link, and description.

File-Level Changes

Change	Details	Files
Add Wallhaven project entry to the README	Inserted a bullet in the Internet section Added oss badge, repo link, and description for Wallhaven	README.md

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[federicotorrielli]

@luong-komorebi hi :) waiting for approval.