[MCP][Dash] Integrate MCP Dashboard via Command Palette
<!--- Please read this! Before opening a new issue, make sure to search for keywords in the issues filtered by the "feature" label: - https://gitlab.com/gitlab-org/gitlab-vscode-extension/-/issues?label_name%5B%5D=type%3A%3Afeature and verify the issue you're about to submit isn't a duplicate. ---> ### Problem to solve <!-- What problem do we solve? Try to define the who/what/why of the opportunity as a user story. For example, "As a (who), I want (what), so I can (why/value)." --> As of this MR, https://gitlab.com/gitlab-org/editor-extensions/gitlab-lsp/-/merge_requests/2421+, the MCP dashboard is now available to extensions that want to host it. ### Proposal <!-- How are we going to solve the problem? --> Implement the MCP dashboard as a command palette command in VSCode. ### Further details <!-- Include examples, use cases, benefits, goals, or any other details that will help us understand the problem better. --> ### Links / references
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