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/table/border.py

@@ -0,0 +1,23 @@
+import re
+
+class Border:
+    def __init__(self, top, right, bottom, left, left_all, right_all):
+        self.top = top
+        self.right = right
+        self.bottom = bottom
+        self.left = left
+        self.left_all = left_all
+        self.right_all = right_all
+
+    def __str__(self):
+        def sym(value, letter):
+            return letter if value else ""
+        T, R, B, L, l, r = self.top, self.right, self.bottom, self.left, self.left_all, self.right_all
+        abbrev = f'{sym(T, "t")}{sym(R, "r")}{sym(B, "b")}{sym(L, "l")}{sym(l, "L")}{sym(R, "R")}'
+        abbrev = re.sub(" ", "", abbrev)
+        if abbrev:
+            abbrev = f"|{abbrev}|"
+        return f'<border{abbrev}>'
+
+    def has(self):
+        return [self.top, self.right, self.bottom, self.left]