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>

tst/cond_test.kt

@@ -0,0 +1,17 @@
+Top level cond: @cond true | is true | is false @
+
+@@cond_test bool :
+  Using cond in klammer: @cond *bool* | is true | is false @
+@@
+
+@cond_test true @
+
+@@frac a | b : *a*/*b* @@
+
+A fraction: @frac 2 | 3 @
+
+@@cond_klammer_test bool :
+@cond *bool*  | @frac 1 | 2 @ | @frac 2 | 1 @ @
+@@
+
+# @cond_klammer_test true @