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/target/target.k

@@ -0,0 +1,55 @@
+#[
+The targets in the SKS use the LaTeX convention for converting ASCII
+characters into standard typographical characters.  This is done
+by LaTeX by default; other targets must use the transforms parameter
+of Parameter_set, as defined for the m_parameters variable of the
+Target_set class.  (See file target_set.cpp.)
+
+The LaTeX transformations supported by the SKS are:
+
+  --   ->  en-dash
+  ---  ->  em-dash
+  `    ->  open single quote
+  '    ->  close single quote
+  ``   ->  open double quote
+  ''   ->  close double quote
+  ~    ->  non-breaking space
+
+]#
+
+
+@@@target txt | Plain text with formatting |  # This txt target is not full implemented in the SKS yet.
+  --  -  |
+  --- -- |
+  ``  "  |
+  ''  "  |
+  `   `  |
+  '   '  |
+  ~   ^0020^
+  :after_apply
+    phases.justify_blocks
+@@@
+
+@@@target html | HTML page
+#  :escape < &lt; & &amp; |
+|
+  --- &mdash; |
+  -- &ndash;  |
+  `` “        |
+  '' ”        |
+  ` ‘         |
+  ' ’         |
+  ^^~ &tilde; |
+  ~ &nbsp;
+@@@
+
+@@@target tex | LaTeX
+:escape \ \textbackslash{} & \& { \{ } \} $ \$ % \% _ \_
+@@@
+
+@@@target pdf | PDF from LaTeX
+  :includes tex
+  :after_apply
+     ^:cpp *KLAMMERTEXT_HOME*/sks/document/document tex_to_pdf
+@@@
+