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/env/lsan.supp

@@ -0,0 +1,12 @@
+# LeakSanitizer suppressions for Klammertext debug builds.
+#
+# Suppress unactionable leaks from the embedded Python interpreter and
+# OpenImageIO module initialization — one-time-init allocations that
+# libraries conventionally leave for the OS to reclaim at exit. Real
+# leaks in Klammertext's own C++ code are still reported.
+#
+# Each "leak:<pattern>" line suppresses any leak whose stack trace has
+# a frame matching the substring (in a function name or library path).
+
+leak:libpython
+leak:OpenImageIO