Initial commit: Klammertext source distribution

Curated source subset assembled by klammertext-dev's doc/make_dist.sh: the Klammermachine (mac), the Standard Klammer Set (sks), the commands (com), editor plugins and install guides (doc), a test subset (tst), and lib/bin placeholders. Builds with 'make -C com'.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mac/eval_cpp.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string>
+
+#include "machine.h"
+
+class Eval_cpp
+{
+public:
+    explicit Eval_cpp(Machine& machine, Locator loc);
+    Eval_cpp(const Eval_cpp&) = delete;
+    Eval_cpp& operator=(const Eval_cpp&) = delete;
+    //~Eval_cpp();
+
+    std::string eval(fs::path library_path, std::string function_name);
+
+    Machine m_machine {};
+    Locator m_loc;
+};