Custom MCP support has disappeared

[cameronapak]

Hey y'all, custom MCP support no longer exists in Macro. It looks like it got removed (accidentally?) when the Pipedream connectors section was added.

The problem is that I have some MCP servers that I'd like to use that aren't within the list of Pipedream.

Please consider adding it back. (I tried to add it back in #6151, but that PR was too big at the same time sidebar changes and stuff were happening)

[cameronapak]

If we do add it back, I want to also bring up #5465 since it's related

[synoet]

Thank you for flagging cam. We will add it back in.