Add MindPal to clients list

[sylviangth]

Motivation and Context

Add MindPal, a new client to MCP Client list

How Has This Been Tested?

• Docs repo has been run locally
• The MCP client on MindPal has been battle tested by 20k+ users over the past 2 weeks

Breaking Changes

No

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

Additional context