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/chekhov/claude/batches/s18.json

@@ -0,0 +1,9 @@
+[
+ {"chunk": 199, "story": 18, "summary": "At a plant sale on a spring morning, the narrator and two other buyers chat while a dignified, well-read old gardener, who dislikes contradiction, listens in hoping to hear something new.", "predicament": "A proud, well-read old man listens to his betters' idle talk, hoping to be asked for his view."},
+ {"chunk": 200, "story": 18, "summary": "A landowner complains that acquittals of obvious criminals corrupt the public; the gardener says he rejoices at every acquittal, because faith in a person is higher than evidence.", "predicament": "A man of lower rank contradicts his betters' confident opinion with a stubborn conviction of his own."},
+ {"chunk": 201, "story": 18, "summary": "Gratified to be asked, he tells a legend from his grandmother about a solitary, silent, learned doctor who settled in a small town and was revered for his skill.", "predicament": "A stranger who keeps entirely to himself in a small town is respected from a distance for his usefulness."},
+ {"chunk": 202, "story": 18, "summary": "The doctor loved the townsfolk like children, treated them for nothing despite his own illness, and was so beloved that he never locked his door.", "predicament": "A man who gives himself selflessly to people not his own comes to be trusted and loved by everyone."},
+ {"chunk": 203, "story": 18, "summary": "Even robbers honoured him, yet one morning he was found murdered with an amazed look on his face; the judges ruled it an accident because nobody could have killed him.", "predicament": "A community refuses to believe that anyone among them could have wronged the person they all revered."},
+ {"chunk": 204, "story": 18, "summary": "A notorious vagrant was caught with the doctor's belongings and a bloodstained shirt; the townsfolk still doubted, and the judges agonised over overwhelming evidence.", "predicament": "People faced with plain proof of a terrible wrong still cannot bring themselves to believe it of anyone."},
+ {"chunk": 205, "story": 18, "summary": "The chief judge could not pronounce sentence and the court freed the man; the gardener says God forgave the town for its faith in humanity, then walks off before anyone can object.", "predicament": "Someone who must condemn another chooses faith in human decency over the plain evidence in front of him."}
+]