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/makefile.env.pop.DISABLED

@@ -0,0 +1,33 @@
+KLAMMERTEXT_HOME = /home/ack/projects/klammertext/K
+
+include $(KLAMMERTEXT_HOME)/mac/env/optimize.env
+
+CPP_VERSION = c++20
+
+CXX = /usr/bin/g++
+
+# Hack for now; to be generalized:
+ifneq ("$(wildcard /usr/include/python3.14)","")
+    PYTHON = python3.14
+else ifneq ("$(wildcard /usr/include/python3.13)","")
+    PYTHON = python3.13
+else
+    PYTHON = python3.12
+endif
+
+CPPFLAGS = \
+-I$(KLAMMERTEXT_HOME)/mac \
+-I/usr/include \
+-I/usr/include/$(PYTHON)
+
+CXXFLAGS = -Wall -Wextra -Weffc++ -Wshadow -std=$(CPP_VERSION) -fPIC $(OPTIMIZE) $(SANITIZE)
+
+LDFLAGS = \
+-L/usr/lib/x86_64-linux-gnu
+
+LDLIBS = \
+-ldl
+
+ifndef NOPYTHON
+LDLIBS += -l$(PYTHON)
+endif