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.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <string>
+
+#include "machine.h"
+#include "katom.h"
+
+enum class eval_t {
+    shell,
+    python,
+    cpp,
+};
+
+class Eval
+{
+public:
+    explicit Eval(Machine& machine, Locator loc)
+        : m_machine(machine),
+          m_loc(loc)
+        {};
+    Eval(const Eval&) = delete;
+    Eval& operator=(const Eval&) = delete;
+    //~Eval_cpp();
+
+    std::vector<Katom> eval(
+        std::vector<Katom>::iterator begin, std::vector<Katom>::iterator end);
+
+    Machine m_machine;
+    Locator m_loc;
+};