[Plugin] Add fpp-matrixscroller

[github-actions]

Adds fpp-matrixscroller to pluginList.json, requested in #45.

Plugin repo: https://github.com/mikeneiderhauser/fpp-matrixscroller
pluginInfo.json: https://raw.githubusercontent.com/mikeneiderhauser/fpp-matrixscroller/refs/heads/master/pluginInfo.json
Submitted by: @mikeneiderhauser
Registered owner (from srcURL): @mikeneiderhauser (matches submitter)

✅ The automated plugin check passed - no blocking issues found.

Schema, category, and archived/issues-disabled were already checked before this PR existed.

Merging is entirely up to a maintainer's judgement - this PR being open is not an approval, especially if it was opened via /submit over unresolved findings above.

⚠️ Before merging: install this plugin on a real (or test) FPP instance and visually inspect it - the automated check only covers what it can grep for. Confirm the UI actually renders correctly in both light and dark theme, nothing looks broken, and there's nothing the automated findings above wouldn't catch (ads, phone-home, donation links, ...).

A repo maintainer (or @mikeneiderhauser) can comment /recheck here to re-run the plugin check against the repo's current state and refresh the findings above.

[darylc]

Hi @mikeneiderhauser

Apologies for the delay in getting back to you, we are working hard to try and get FPP 10 finished & released.

A few things we'd need you to look at before accepting please:

• Can you please bind the daemon to 127.0.0.1 rather than 0.0.0.0 so that your plugin does not bypass FPP's UI authentication if its enabled.
• You have implemented your own dark more, can you please honor the FPP dark/light mode settings instead and remove the button?
• Can you please consider renaming your backup/restore feature to something like "Templates" or "Snapshots" with a required user-chosen name instead of auto-timestamped saves that will reduce duplication and confusion with FPP's backup functionality.

If you were looking for ideas - In future you might also want to consider adding FPP commands so that users can start/stop/change Templates on your plugin from a playlist as their show changes phases.

Cheers,
Daryl