Add support for preSharedKey in WireGuard configurations and fix the parsing function to correctly handle all necessary fields.
Previously, the application did not support the optional preSharedKey parameter in WireGuard config files, forcing users to rely on JSON custom configurations. This update introduces a dedicated field for preSharedKey in the UI, aligning with Xray Core's support and simplifying the setup process for users.
Changes include:
- Added `preSharedKey` field in the WireGuard UI configuration.
- Updated `parseWireguardConfFile` function to correctly parse `PrivateKey`, `PublicKey`, and `preSharedKey`.
- Ensured `preSharedKey` is optional and handled gracefully when absent.
- Updated `toOutbound` method to include `preSharedKey` in the outbound configuration.
- Set `remarks` to the current Unix time during parsing.
Tested with the following configuration:
```[Interface]
Address = 192.168.6.66/32
DNS = 1.1.1.1,8.8.8.8
PrivateKey = eD/6cpJQaEeDH05AMeFyN3KSLLX+7YFR+MYRdgPDQ3Y=
[Peer]
publickey=/HS7r3waPuU7tTBLd2FlBhC+VROpJ5bwh5XXxuOoKFs=
AllowedIPs = 0.0.0.0/0, ::/0
Endpoint = sg3.vpnjantit.com:1024
```
Resolves#3512
9b4cc201e7