We should consider adding the ability to launch a pre-filled connection prompt from a URL. We'd likely want to prompt the user to confirm before connecting to prevent potential security risks.

This would be accomplished by defining a UriHandler and handling a specific URI scheme such as `/connect?connectionString=....`. Example of usage in another extension: https://github.com/vadimcn/codelldb/blob/e5aef55fd68b54f9f33c7c293e0321d7f6396be8/extension/externalLaunch.ts#L9C41-L9C51

This would benefit cross-tool experience; as was the request from Atlas CLI team:

Context: Our goal is to provide a seamless end-to-end experience for users. We want users to set up their deployments using AtlasCLI, and then automatically connect to them using MongoDB for VSCode.