Switch to higher level XPC & enforce signing requirements (#681)

* Revert "Add launch constraints (#678)"

This reverts commit c5a610d786.

* .

* Cleanup.

Sources/SecretAgentInputParser/SecretAgentInputParser.swift

@@ -0,0 +1,17 @@
+import Foundation
+import OSLog
+import XPCWrappers
+import SecretAgentKit
+
+final class SecretAgentInputParser: NSObject, XPCProtocol {
+
+    private let logger = Logger(subsystem: "com.maxgoedjen.secretive.SecretAgentInputParser", category: "SecretAgentInputParser")
+
+    func process(_ data: Data) async throws -> SSHAgent.Request {
+        let parser = SSHAgentInputParser()
+        let result = try parser.parse(data: data)
+        logger.log("Parser parsed message as type \(result.debugDescription)")
+        return result
+    }
+
+}