Initial commit: ASL handshape recognition project

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

make_all_letter_directories.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Create train/val directories for per-letter binary datasets:
+# data/asl/train/{A,Not_A,...,Z,Not_Z} and same under val/
+
+set -euo pipefail
+
+for split in train val; do
+  for L in {A..Z}; do
+    mkdir -p "data/asl/$split/$L"
+    mkdir -p "data/asl/$split/Not_$L"
+  done
+done
+
+echo "✅ Created data/asl/train|val/{A,Not_A,...,Z,Not_Z}"