New install scripts, raylib deps + odin.

scripts/install_odin

@@ -0,0 +1,32 @@
+#!/bin/bash
+# ---------------------------------------------------------------------------------
+# Odin compiler install recipe
+# Target: Debian 13 Trixie
+# Builds from source - recommended method on Linux
+# ---------------------------------------------------------------------------------
+set -e
+
+ODIN_DIR="$HOME/odin"
+
+echo "Installing Odin build dependencies..."
+sudo apt-get update
+sudo apt-get install -y clang llvm lld
+
+echo "Cloning Odin repository..."
+git clone https://github.com/odin-lang/Odin "$ODIN_DIR"
+cd "$ODIN_DIR"
+
+echo "Building Odin compiler..."
+./build_odin.sh release
+
+echo "Adding Odin to PATH..."
+if ! grep -q 'odin' "$HOME/.bashrc"; then
+    echo "export PATH=\$PATH:$ODIN_DIR" >> "$HOME/.bashrc"
+fi
+
+echo ""
+echo "✓ Odin install complete."
+echo "  Compiler: $ODIN_DIR/odin"
+echo ""
+echo "  Run: source ~/.bashrc  (or open a new terminal)"
+echo "  Then verify with: odin version"