Is it possible to add support for multiple certificates?

### Prerequisites

- [x] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [x] I have searched other issues and found no duplicates

- [x] I want to request a feature or enhancement and not ask a question

### The problem

Could adguardhome add support for multiple certificates? Specifically, support for both domain and IP certificates simultaneously. IP certificates are becoming increasingly essential, as only one can be chosen when issuing certificates—either an IP certificate or a domain certificate. Therefore, we request adguardhome to support multiple certificates concurrently.

### Proposed solution

none

### Alternatives considered and additional information

_No response_