generate third party notice files (#3)

the library to generate third party notice files are unable to detect all relevant dependencies for a package due to the monorepo structure and how some part of the node_modules are shared and hoisted to the top level node_modules top level folder.
As a workaround, this PR add a script to copy the target package into a temp folder to generate the full node_modules folder to generate the third party notice file and copy that back into the target package.

**NOTE**: will update chat-headless-react's third party notice file and headless version in package in a new PR


J=CLIP-117
TEST=manual

see that the third party notice files are generated as expected.

.gitignore

@@ -1,5 +1,6 @@
 node_modules/
 coverage/
+temp/
 dist/
 .DS_Store
 .env

LICENSE

@@ -0,0 +1,33 @@
+The files listed in this repository are licensed under the below license.  All other features and products are subject to separate agreements and certain functionality requires paid subscriptions to Yext products.
+
+Contains information from the language-subtag-registry JSON Database (https://github.com/mattcg/language-subtag-registry/tree/master/data/json) which is made available under the ODC Attribution License (https://github.com/mattcg/language-subtag-registry/blob/master/LICENSE.md).
+
+BSD 3-Clause License
+
+Copyright (c) 2023, Yext
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

generate-notices.sh

@@ -0,0 +1,15 @@
+# Because of the monorepo structure, license-check from generate-license-file lib is an unable
+# to properly parse all the relevant depedencies in the node_modules of a package. This script
+# will temporarily copy the target package outside of the packages/ to generate the
+# third-party-notice file and add it to the package.
+
+
+PACKAGE_DIR=$(pwd)
+REPO_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+echo "copying package $PACKAGE_DIR to $REPO_DIR/temp"
+rm -rf "$REPO_DIR/temp"
+cp -r $PACKAGE_DIR "$REPO_DIR/temp"
+cd "$REPO_DIR/temp" && npm i
+generate-license-file --input package.json --output THIRD-PARTY-NOTICES --overwrite
+cp "$REPO_DIR/temp/THIRD-PARTY-NOTICES" $PACKAGE_DIR
+rm -rf "$REPO_DIR/temp"