feat: add license, contributing and notice files

[manojava-gk]

Description

Add license, notice and contributing files to the repo

Issues

https://github.com/eclipse-tractusx/eclipse-tractusx.github.io.largefiles/issues/16

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• [x] DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• [x] Copyright and license header are present on all affected files

[danielmiehle]

@AngelikaWittek can you please also check whether the documents are correct. Thank you!

[manojava-gk]

@AngelikaWittek added. Kindly check

[danielmiehle]

@manojava-gk : Thank you for preparing the PR!