feat: add mcp-folder icon

[DogFortune]

Description

fixes #3021

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[PKief]

The mcp folder name is quite popular at the moment and it would be worth having an icon for it. However, it's a little bit difficult to have a pixel perfect motive when we make use of the "official" mcp icon here. @lucas-labs do you have an idea how we could improve this? Maybe we would need use something else which would be a better fit.

An MCP Server is the kind of the connection between AI Agents and any custom written tool to enhance the AI Agent. In some rare cases I could see that people were using something like this as an icon:

Although having something more close to the official icon would also be nice - not sure at this point tbh :D

[lucas-labs]

Hi @PKief, yeah, the official logo basically has no straight vertical/horizontal lines. Which means blurriness like this is unavoidable

The problem with mcp folder is that it can be a server, but it can also be a client, depending on what you're working on. Choosing an alternative icon for this one will be hard!