fix: validate active project in firestore:locations command

[joehan]

Description

Updates the firestore:locations command action to retrieve the active project ID via needProjectId(options).

Previously, running firestore:locations without an active project would pass options.project (which is undefined/null) directly to api.locations(options.project). This resulted in calling the GCP Firestore API with /projects/null/locations or /projects/undefined/locations.

By using needProjectId(options) at the top of the command action, we ensure that a clean user-facing validation error ("No currently active project...") is thrown immediately if no project is active, matching standard CLI patterns.

Scenarios Tested

1. Tested running firestore:locations without an active project (expected behavior: clean "No currently active project..." error message instead of failing on backend API call).
2. Tested running firestore:locations with a valid active project (expected behavior: successfully fetches and lists the firestore locations).

Sample Commands

• Running without a project:
  firebase firestore:locations
  • Before: Fails on backend call with 403 Permission Denied on project null.
  • After:

    Error: No currently active project.
    To run this command, you need to specify a project. You have two options:
    - Run this command with --project <alias_or_project_id>.
    - Set an active project by running firebase use --add, then rerun this command.
    To list all the Firebase projects to which you have access, run firebase projects:list.
    To learn about active projects for the CLI, visit https://firebase.google.com/docs/cli#project_aliases
    

[gemini-code-assist]

Code Review

This pull request updates the firestore:locations command to retrieve the project ID using the needProjectId utility function instead of directly accessing options.project. This ensures that a valid project ID is present before attempting to fetch the Cloud Firestore locations. There are no review comments, and I have no feedback to provide.