story-to-pack: add the corpora and the catalogue v2/v3

Fourteen corpora split and classified: aesop, bierce, chekhov, holmes,
keefe, lawson, lorimer, maupassant, nobody, plaintales, poe, torchy,
wallingford and winesburg, each with its splitter and the hand-written
groups and pages; catalogue v2 and v3; and the shared splitters
gutenberg_chunks.py, se_split.py and se_build.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019rwKTmug58sEsJ72AuWsEi

tools/story-to-pack/probe/lawson/claude/batches/s25.json

@@ -0,0 +1,14 @@
+[
+ {
+  "chunk": 138,
+  "story": 25,
+  "summary": "On the first day back at school the master calls the roll and reads the name of a girl who has died; her sister sobs and the school dunce brightly answers 'Dead, sir'.",
+  "predicament": "Someone in charge of children calls out the name of one who has died, and a slow child answers it far too cheerfully."
+ },
+ {
+  "chunk": 139,
+  "story": 25,
+  "summary": "The master asks for quiet out of respect; the dunce asks what D stands for and is elbowed by a classmate.",
+  "predicament": "When a respectful silence is asked for, a slow child blunders a second time, and a classmate punishes him for it."
+ }
+]