move create-extractor-pack to a scripts folder

ql/scripts/create-extractor-pack.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -eux
+
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  platform="linux64"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+  platform="osx64"
+else
+  echo "Unknown OS"
+  exit 1
+fi
+
+cargo build --release
+
+cargo run --release -p ql-generator -- --dbscheme ql/src/ql.dbscheme --library ql/src/codeql_ql/ast/internal/TreeSitter.qll
+codeql query format -i ql/src/codeql_ql/ast/internal/TreeSitter.qll
+
+rm -rf extractor-pack
+mkdir -p extractor-pack
+cp -r codeql-extractor.yml tools ql/src/ql.dbscheme ql/src/ql.dbscheme.stats extractor-pack/
+mkdir -p extractor-pack/tools/${platform}
+cp target/release/ql-extractor extractor-pack/tools/${platform}/extractor
+cp target/release/ql-autobuilder extractor-pack/tools/${platform}/autobuilder