Update Zenodo metadata: Contributors, Description, and Community

[kjvbrt]

This PR updates the .zenodo.json file to improve the metadata for Zenodo releases, ensuring all major contributors are credited.

Changes:

• Creators: Expanded the author list to include contributors with 5 or more pull requests, as well as principal authors listed in the documentation.
• Alphabetical Ordering: Re-sorted the entire creator list alphabetically by surname.
• Description: Added a project overview to help with discovery on Zenodo.
• Community: Updated the community identifier to fcc-phex.

Contributors and PR Counts:

The following list includes authors meeting the 5+ PR threshold (or listed as principal authors), ordered by the estimated number of merged pull requests:

1. Helsens, Clement (86 PRs)
2. Smieško, Juraj (55 PRs) - New
3. Jamin, David Olivier (35 PRs) - New
4. Volkl, Valentin (32 PRs)
5. Perez, Emmanuel (31 PRs)
6. Selvaggi, Michele (19 PRs)
7. Carceller, Juan Miguel (12 PRs) - New
8. Forthomme, Laurent (12 PRs)
9. Madlener, Thomas (10 PRs) - New
10. Francois, Brieuc (8 PRs) - New
11. Desai, Aman (7 PRs) - New
12. Eysermans, Jan (5 PRs) - New
13. Ganis, Gerardo (Principal Author in manual pages) - New
14. Munch Torndal, Julie (2 PRs)

Note: PR counts were estimated by analyzing merge commits and branch origins.

This update ensures that the project metadata accurately reflects the collaborative effort of the FCCAnalyses community.