add release please configuration

[baywet]

reflection of https://github.com/microsoftgraph/msgraph-beta-sdk-java/issues/940 on this repository. We want:

• [x] release please header file (yaml .github/release-please.yml)
• [x] release please manifest (json .release-please-manifest.json)
• [x] release please config (json release-please-config.json)
• [x] release please workflow to trigger on main branch (.github/workflows/release-please.yml)
• [x] install the release please GitHub app to the repository
• [x] changelog keep a changelog header and unreleased information to be removed
• [x] contributing to be updated with commit formatting instructions
• [x] version bump script to be deleted (and removed from the weekly generation process)
• [x] files where the version needs to be updated to be ammended with the special comments for release please