Add bounded DER certificate explorer

trustlab/sdk/plugin-api.ts

@@ -21,7 +21,10 @@ export interface CertificateFacts {
   readonly validUntil?: string;
   readonly isCa: boolean;
   readonly keyUsages: readonly CertificateKeyUsage[];
+  readonly unsupportedCriticalExtensions?: readonly string[];
   readonly selfSigned: boolean;
+  readonly derBase64?: string;
+  readonly der?: Readonly<Record<string, unknown>>;
 }
 
 export type CertificateKeyUsage =