[VS Code] Always show "Generate Operation" code lens

[fredzqm]

Even when project isn't present, show the "Generate Operation" code lens. Always error out suggesting connecting a Firebase Project.

[gemini-code-assist]

Summary of Changes

Hello @fredzqm, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the user experience for the Firebase VS Code extension's Data Connect features by making the "Generate Operation" code lens consistently visible. This change allows users to see the available action earlier, while robustly handling the requirement for a connected Firebase project by adding a runtime check and informative error message when the operation is actually triggered.

Highlights

• Code Lens Visibility: The "Generate Operation" code lens will now always be displayed in VS Code for Data Connect operations, regardless of whether a Firebase project is currently connected.
• Optional Project ID: The projectId field in the GenerateOperationInput interface has been made optional to support the always-on code lens.
• Runtime Project ID Check: A check was added to the generateOperation function to ensure a projectId is present before attempting to generate an operation, providing a user-friendly error message if it's missing.

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[gemini-code-assist]

Code Review

This pull request correctly modifies the behavior to always show the 'Generate Operation' code lens, moving the project existence check into the command handler. The changes are logical and well-implemented. I've included one suggestion to improve code readability by using a more modern loop construct.

[gemini-code-assist]

For improved readability and to use a more modern TypeScript construct, you can use a for...of loop here since the index i is not used within the loop.

Suggested change

	for (let i = 0; i < comments.length; i++) {
	const c = comments[i];
	for (const c of comments) {

[fredzqm]

@hlshen Here is a very small incremental improvement.

This can improve discoverability of this code lens even if the developer started without a project.