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>

sks/kutil/klammer_base.cpp

@@ -0,0 +1,56 @@
+#include <string>
+#include <map>
+
+#include "error.h"
+#include "klammer_base.h"
+#include "show.h"
+
+std::string Klammer_base::get(std::string name)
+{
+    //std::cout << "GET " << name << "\n";
+    std::string result = m_machine.m_state.value(name);
+    return result;
+}
+
+std::string Klammer_base::get(const char* name)
+{
+    // msg() << "GETc " << name << "\n";
+    std::string sname { name };
+    std::string result = m_machine.m_state.value(name);
+    return result;
+}
+
+
+std::string Klammer_base::html()
+{
+    return "[html target undefined]";
+}
+
+std::string Klammer_base::tex()
+{
+    return "[tex target undefined]";
+}
+
+std::string Klammer_base::txt()
+{
+    return "[txt target undefined]";
+}
+
+std::string Klammer_base::result()
+{
+    std::string target = get("K_target");
+    if (target == "html")
+        return html();
+    else if (target == "tex" or target == "pdf")
+        return tex();
+    else if (target == "txt")
+        return txt();
+    else
+        throw Target_error("Unknown target: " + target);
+}
+
+void Klammer_base::show(std::string klammer_name)
+{
+    std::cout << "Arguments of klammer \"" << klammer_name << "\"\n"
+              << m_machine.m_state.describe() << "\n";
+}