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/show.cpp

@@ -0,0 +1,43 @@
+#include <string>
+#include <sstream>
+#include <map>
+#include "util.h"
+#include "eval.h"
+#include "machine.h"
+#include "klammer_base.h"
+
+using namespace std;
+
+extern "C" VISIBLE string show(std::map<std::string, std::string> args)
+{
+    cout << "SHOW\n" << args << "\n";
+
+    return "SHOW";
+
+    string s = getarg(args, "s");
+    string target = getarg(args, "_target");
+
+    string kt = string_replace(s, "\\^\\^", "__CIRCUM__");
+    kt = string_replace(kt, "\\^", "");
+    kt = string_replace(kt, "__CIRCUM__", "HAT");
+    //kt = "@lit " + kt + " @";
+    cout << "Modified: " << kt << "\n";
+
+    Machine M {};
+    M.state.state.set("K_program_name", "show");
+    Text T(true);
+
+    T.read_string(kt);
+    T.parse();
+    M.extract_definitions(T);
+    M.apply(target, T);
+    string processed = M.to_string(target, T);
+    
+    stringstream ss {};
+    //ss << s << sp_arrow << processed;
+
+    ss << "@t " << s << " @ | "  << processed;
+
+    return ss.str();
+}
+