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/s18.json

@@ -0,0 +1,20 @@
+[
+ {
+  "chunk": 102,
+  "story": 18,
+  "summary": "Mitchell plans to go down among the farms, where a farmer once wanted to keep him and the daughters liked his fiddle, and he will never want for tucker.",
+  "predicament": "A man with no work dreams aloud of the easy place where he will be welcomed like family and never go hungry again."
+ },
+ {
+  "chunk": 103,
+  "story": 18,
+  "summary": "He imagines shearing the farmer's sheep, growing restless and giving notice, and the farmer demanding to know if he means to marry the girl.",
+  "predicament": "A man who dreams of a good position also imagines growing bored and wanting to leave, and being cornered into staying."
+ },
+ {
+  "chunk": 104,
+  "story": 18,
+  "summary": "He will marry her for the farm and two hundred pounds, and tells his mate he can come for tucker if he is hard up, but not while Mitchell is away.",
+  "predicament": "A drifter imagines being bribed into settling down, and promises his old mate a welcome that already comes with conditions."
+ }
+]