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/deftype.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <string>
+#include <map>
+
+#include "ktype.h"
+
+enum class defmode_t { def_create, def_override, def_default };
+
+struct defmode_result {
+    bool replace;
+    bool warn;
+    std::string message;
+};
+
+defmode_t defmode_from_katom(katom_t type);
+const defmode_result& defmode_transition(defmode_t existing, defmode_t incoming);