Handle non-E catch branch in JSRemote typed continuation

Co-authored-by: Shelley <shelley@exe.dev>

Author: kateinoigakukun

Sources/JavaScriptEventLoop/JSRemote.swift

@@ -70,6 +70,8 @@ private final class _JSRemoteContext: @unchecked Sendable {
                 continuation.resume(returning: .success(try body(sourceObject)))
             } catch let error as E {
                 continuation.resume(returning: .failure(error))
+            } catch {
+                preconditionFailure("Unexpected error type: \(error)")
             }
             return false
         }