feat: integrate MongoDB MCP server with VSCode extension MCP-129

[himanshusinghs]

Description

This PR integrates MCP server with VSCode extension. The idea is to have VSCode extension contribute an MCP server and given the right settings, also start it for further use with Copilot.

A note for reviewers:
The branch feat/mcp-integration was used as a base to merge the ongoing MCP integration work. So all the project work was duly reviewed and only the PR review feedback was directly committed to the branch. Having said that feel free to do an extensive review on this.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[Copilot]

Pull Request Overview

This PR integrates the MongoDB MCP (Model Context Protocol) server functionality into the VSCode extension, allowing it to provide database access and tools to AI assistants that support MCP.

Key Changes:

• Adds MongoDB MCP server integration with auto-start configuration and connection management
• Updates VS Code engine requirement to 1.101.1 and Node.js compatibility to support newer versions
• Refactors icon paths to use vscode.Uri instead of strings for better type safety

Reviewed Changes

Copilot reviewed 48 out of 49 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/mcp/	New MCP controller, connection manager, and error handler implementation
src/mdbExtensionController.ts	Integrates MCP controller with extension activation and command registration
package.json	Adds MCP server dependency, updates engine requirements, and adds MCP configuration settings
src/test/suite/	Adds comprehensive test coverage for MCP functionality
Multiple explorer files	Updates icon path handling to use vscode.Uri for type safety

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