Migrate all project files from repo root into prj/<name>/

Moved all 40 existing projects' .prj/.dat files (Layer weights, training
batches, legacy .weights.dat/.test.dat artifacts) from the flat repo root
into their own prj/<name>/ folder via git mv, matching the new path
convention from the previous commit. Filenames are unchanged, only the
directory. Non-project files at root (CLAUDE.md, Makefile, batch/moby
text corpora, the stray Layer.0.training.mat) were left in place.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016K8Gu7Qejd11JbdiHZqYAs

prims_deep_24_24_4.Layer.0.bh.dat

@@ -1,3 +0,0 @@
-ARMA_MAT_TXT_FN008
-1 24
-  -6.5108062493309475e+00   8.6353865733274517e+00   5.8132758039106589e+00   1.9450373221128436e+00  -3.7217407066392796e+00   7.3103935435988596e+00   7.1277664031345758e+00   2.6784695501480620e+00   1.7096483964440587e+00   3.5624642709428689e+00   3.0810386009945043e+00   4.4082749294851773e+00   8.2207077422584196e-01   2.7257519248416200e+00   2.7686735773874300e+00  -1.4129759196377929e+01   2.9242524114205914e+00   7.2536830357486997e+00   6.6937653518110904e+00   7.4085955089229110e+00   1.8819155882143257e+00   1.1871663427513801e+00   1.4871939520157471e+00  -4.6725525455833088e+00