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/prims_deep_24_4/prims_deep_24_4.Layer.1.bv.dat

@@ -0,0 +1,3 @@
+ARMA_MAT_TXT_FN008
+1 24
+  -3.1902296363669200e+00  -9.4473538279997116e-01  -4.0067167209764704e-01  -4.1321379591641128e+00  -8.5913416164291223e-01   8.7587382600072405e-01  -2.8385313371679732e+00  -2.7927011593578666e+00   3.4100747920933577e-01  -3.9298406138733882e-01   1.0670997851300665e+00  -1.1157597228134180e+00   1.3967085922172209e+00  -2.2174922959958754e+00  -4.9523417181502358e+00   5.2145231646609447e-01  -2.7812178685259554e+00  -3.4041227986514891e-02  -7.2878963566318966e-01   1.9234035988641236e+00  -2.7716993138132970e+00  -6.3768116178074861e+00  -1.1173543370668497e+00  -1.5454031689307042e+00