Support mcp servers as a first class resource

[sandy081]

Support mcp servers as a first class resource.

At present mcp servers are configured in user settings and it wont scale as we go forward. Support them as a separate resource like user tasks.

[sandy081]

cc @connor4312

[iwangbowen]

Putting MCP configurations in settings really makes the settings file messy

[jo-oikawa]

Continuing my user journey notes from https://github.com/microsoft/vscode/issues/245717

4. Configuring

User Stories / Jobs to be Done

• As a user, I want to configure server settings to match my project needs.
• As a user, I want to validate my configuration before starting the server.

UX Friction / Bugs

• Tools list in quick-pick gets lengthy really quick.

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5. Using

User Stories / Jobs to be Done

• As a user, I want to start, stop, and interact with MCP Servers efficiently.
• As a user, I want to view logs and server status in real time.

UX Friction / Bugs

• Can't see status for more than one server at a time from chat.

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6. Managing

User Stories / Jobs to be Done

• As a user, I want to update, remove, or manage multiple MCP Servers.
• As a user, I want to receive notifications about server health or updates.

UX Friction / Bugs

• No bulk management options for multiple servers.