Adding dynamic updating to code lens active connection.

[aasimkhan30]

Pull Request Template – vscode-mssql

Description

This update adds dynamic updating for the active CodeLens connection when connection changes are made outside the editor.
It also refactors the connection manager to use the VS Code EventEmitter instead of the Node.js Event

Code Changes Checklist

• New or updated unit tests added
• All existing tests pass (npm run test)
• Code follows contributing guidelines
• Telemetry/logging updated if relevant
• No regressions or UX breakage

Reviewers: Please read our reviewer guidelines

[github-actions]

PR Changes

Category	Main Branch	PR Branch	Difference
Code Coverage	58.52%	58.45%	$${\color{lightgreen} -.07\% }$$
VSIX Size	15304 KB	15319 KB	$${\color{lightgreen} 15 KB \space (0\%) }$$
Webview Bundle Size	3688 KB	3688 KB	$${\color{lightgreen} 0 KB \space (0\%) }$$

[aasimkhan30]

@lewis-sanchez , can you please verify if schema compare feature is working fine?

[Benjin]

What connection changes from outside the editor are occuring that we want to impact the editor? For example, if I open an editor from a specific connection, then edit the connection (using the connection dialog), I don't think we'd want to change that editor's already-established connection. Are there other instances this is capturing?

[aasimkhan30]

By "outside the editor," I mean if you change the connection using the status bar at the bottom, or if Copilot opens an untitled editor and connects it to a different database.