feat: support bulk deletion of resources

[robingenz]

Current problem

All delete commands (certificates, channels, bundles, etc.) only support deleting a single resource at a time. When cleaning up multiple entries (e.g. all Android certificates), this requires running the command repeatedly for each resource.

Preferred solution

Support filter-based bulk deletion. For example, apps:certificates:delete --app-id <id> --platform android --yes should delete all matching Android certificates at once. The bulk delete API endpoints already exist — the CLI just needs to support calling them.

Alternative options

No response

Additional context

No response

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