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/s04.json

@@ -0,0 +1,20 @@
+[
+ {
+  "chunk": 28,
+  "story": 4,
+  "summary": "Before going down the shaft, Jack asks his brother Tom not to let the sun go down on their quarrel; Tom refuses his hand, then sits alone feeling mean.",
+  "predicament": "A younger brother apologises for a quarrel before a dangerous task, and the elder refuses his hand out of stubborn pride."
+ },
+ {
+  "chunk": 29,
+  "story": 4,
+  "summary": "Tom decides to go and make up, but the shaft caves in on Jack; Tom rallies the diggers to dig through from old workings.",
+  "predicament": "Just as a man decides to make peace with someone he snubbed, disaster traps the other, and he must lead the rescue."
+ },
+ {
+  "chunk": 30,
+  "story": 4,
+  "summary": "Tom digs like a madman, breaks through in time to save Jack, then collapses with a burst heart, gripping his brother's hand as he dies.",
+  "predicament": "A man drives himself past every limit to reach someone he wronged, and saving him costs everything he has left."
+ }
+]