[Feature] Manage Elastic Endpoint Policy Settings

**Is your feature request related to a problem? Please describe.**

I would like to manage my Elastic Endpoint policies as configuration, specifically: Trusted Applications, Event Filters, Host Isolation Exceptions, and Blocklist.

These can grow quite big and complex, and having a proper way to manage and audit trail them would be helpful.

**Describe the resource you would like to have implemented.**

I'm honestly not sure which API endpoint this would be, it might be part of Fleet, or part of Security, I wasn't really able to find this information clearly.

**Describe the solution you'd like**

I'd like resources to be able to manage these.

**Describe alternatives you've considered**

I could either manage them via the UI, via a script of some kind, or via something like the generic Mastercard rest api.

**Additional context**


Start by determining whether Fleet or Security owns the Elastic Endpoint policy APIs mentioned in the issue, then review the provider's existing resource patterns. Done means Terraform resources can manage Trusted Applications, Event Filters, Host Isolation Exceptions, and Blocklist settings with auditable configuration and documented behavior.

Written by the indexing model from the issue text.