docs: update README with onboarding info and kick off PDF

[albertoramosmonagas]

What type of PR is this?

• documentation
• cleanup
• repository management

What this PR does / why we need it:

This PR improves the onboarding experience and documentation for the PredictiveConnectivityData API repository. Specifically, it:

• Updates the README.md:
  • Adds a detailed Scope section describing the API's purpose and use cases.
  • Completes the Contributing section with meeting schedule, registration link, mailing list, and link to 2025 meeting minutes.
• Removes the outdated README.md from the supporting-documents folder.
• Adds the Kick Off session presentation as a PDF in supporting-documents.
• Add maintainer section

These changes help new contributors quickly understand the context, join calls, and find relevant documentation.

Which issue(s) this PR fixes:

Fixes #4
Fixes #2
Fixes camaraproject/APIBacklog#191

Special notes for reviewers:

Please validate the meeting information and links to CAMARA Wiki are correct and up to date.

Changelog input

 release-note

Additional documentation

This section can be blank.

docs

[albertoramosmonagas]

The only pending task is to update the meeting cadence once it's confirmed.

It should be added in the CAMARA Wiki here:
🔗 https://lf-camaraproject.atlassian.net/wiki/spaces/CAM/pages/119996417/PredictiveConnectivityData
→ in the section: Meetings | Registration / Join (TBD)

It should also be updated in the GitHub README.md under the Contributing section.

Once both updates are done, we can close this issue:
✅ #2

[hdamker]

I'm aware that the PR is not yet ready for review ... just two comments from my side upfront.

[hdamker]

Just the hint that smaller PRs which are addressing one aspect at the time are easier to manage an won't stay open a longer time.

[albertoramosmonagas]

Just the hint that smaller PRs which are addressing one aspect at the time are easier to manage an won't stay open a longer time.

Totally agree with you herbert, in this case we are blocked because we have no answer to get the link to the meeting cadence, it is the only thing left of the PR.

[hdamker]

Totally agree with you herbert, in this case we are blocked because we have no answer to get the link to the meeting cadence, it is the only thing left of the PR.

Please ping / remind support@camaraproject.org to get the link. And consider to merge now and do the remaining update when the information is available.

[hdamker]

LGTM

[hdamker]

Just realized that the PR also contains changes to the MAINTAINERS.MD file. That should be done better in a separate PR with an explicit title as it needs some background work by the admin team (for that reason the admin team is also codeowner of the file).

But as we are here and have all approvals (except @eric-murray as codeowner, but I assume that he is fine with the PR): I added @eric-murray @albertoramosmonagas @sachinvodafone and @Noel-Wirzius-DT to @camaraproject/predictive-connectivity-data_maintainers and invited @VGF-TEF to the CAMARA organization as pending member of the team. Please accept the invitation and welcome!