Add a temp Doxygen script

Generate API reference with local doxygen outside of the Bazel build

TODO: remove after #6

Author: Horolsky

docs/generate_doxy.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/bash
+# Generate doxygen documentation
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)
+DOXYDIR=$SCRIPT_DIR/doxygen
+mkdir -p $DOXYDIR
+cd $DOXYDIR && doxygen Doxyfile
+echo "API reference generated: $DOXYDIR/html/index.html"