Initial whetstone_RSA architecture and C++ scaffold

include/whetstone_rsa/probe.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "whetstone_rsa/types.h"
+
+#include <memory>
+#include <string>
+
+namespace whetstone::rsa {
+
+class Probe {
+public:
+    virtual ~Probe() = default;
+
+    [[nodiscard]] virtual std::string id() const = 0;
+    [[nodiscard]] virtual bool supports(const GateDefinition& gate_definition,
+                                        const GateEvidence& evidence) const = 0;
+    [[nodiscard]] virtual ProbeResult run(const ProbeRequest& request) const = 0;
+};
+
+using ProbePtr = std::shared_ptr<Probe>;
+
+}  // namespace whetstone::rsa