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.1.bv.dat

@@ -1,3 +0,0 @@
-ARMA_MAT_TXT_FN008
-1 24
-  -8.9242543636783065e+00   1.1533241495169770e+01   1.0445659824420730e+01   1.8988862505126050e+00  -3.6758090557189180e+00   1.0704068496009379e+01   6.7326755668890312e+00   2.4755617780231103e+00   1.6741884540651604e+00   3.2274929112892754e+00   2.9778051577261015e+00   3.6447132211997046e+00   8.1440318527381650e-01   2.7216407917485395e+00   2.6929933288481833e+00  -7.3395421758557768e+00   2.7077737934500563e+00   1.1038574765303123e+01   6.2494802640909368e+00   5.6929597842222721e+00   1.8701352529739199e+00   1.2122993797048291e+00   1.5249922123072059e+00  -4.3725654898384132e+00