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

prj/cont/cont.Layer.0.bh.dat

@@ -0,0 +1,3 @@
+ARMA_MAT_TXT_FN008
+1 16
+   7.6201901418640250e-01  -7.4621531019670881e-02   2.3178334414078128e-01   2.1055659802294930e+00   1.3491518219456905e-01   2.0987129314920352e-01   1.1950509113362846e+00   6.6029553126025375e-01   1.3528679932344894e+00  -4.8168257101626505e-01   7.1508013462954612e-01  -2.1185649985829240e+00   6.2371235370256559e-02  -3.9612253985964713e-01  -9.7969176792157353e-01   2.1662534955817817e-01