Create LICENSE

[sammitachak]

Added a collated LICENSE file at the root level directory. The license are as per the README file (https://github.com/datanucleus/javax.persistence/blob/master/README.md#legal). The licenses are Eclipse Distribution License 1.0 (https://www.eclipse.org/org/documents/edl-v10.php) and Eclipse Public License 1.0 (http://www.eclipse.org/legal/epl-v10.html).

(Please note that the Copyright year and owner fields have been intentionally left empty since Google LLC doesn't own this repository)

[andyjefferson]

The LICENSE.txt is already under src/main/resources.

[sammitachak]

Hello @andyjefferson ,

The Github API to fetch license does not work for the repository. It works if the license for the repository is present at the root level as per https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/licensing-a-repository#determining-the-location-of-your-license.

curl -L   -H "Accept: application/vnd.github+json"   -H "Authorization: Bearer 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"   -H "X-GitHub-Api-Version: 2022-11-28"   https://api.github.com/repos/datanucleus/javax.persistence/license


{
  "message": "Not Found",
  "documentation_url": "https://docs.github.com/rest/licenses/licenses#get-the-license-for-a-repository"
}

We are making this fix for the Github API to fetch license.