fix(parser): handle raw SeedPGP payloads without prefix

Modifies the frame parsing logic to accommodate Base45-encoded SeedPGP payloads that are missing the 'SEEDPGP1:' prefix and CRC. This scenario occurs with certain QR code generators, such as some modes on Krux devices.

- `frameParse` now detects when the prefix is missing and treats the entire input as a raw Base45 payload.
- A `rawPayload` flag is added to the `ParsedSeedPgpFrame` type to signal this case.
- `frameDecodeToPgpBytes` now bypasses the CRC check when this flag is true, allowing the decryption to proceed.
- This resolves a bug where valid encrypted payloads were being rejected due to a missing frame structure.

src/lib/types.ts

@@ -11,6 +11,7 @@ export type ParsedSeedPgpFrame = {
     kind: "single";
     crc16: string;
     b45: string;
+    rawPayload?: boolean;
 };
 
 // Krux KEF types