PR #1070 - XMOJ-Script-dev/XMOJ-Script

What does this PR aim to accomplish?:

How does this PR accomplish the above?:

Does this PR need a documentation update?:

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I have read and understood the contributor's guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against. (dev for XMOJ-Script, master for everything else).
I have commented on my proposed changes within the code.
I have tested my changes.
I am willing to help maintain this change if there are issues with it later.
It is compatible with the GNU General Public License v3.0
I have squashed any insignificant commits. (git rebase)
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I give this submission freely and claim no ownership to its content.
I have verified that my changes work correctly in all four UI combinations:
- the script's monochrome UI on XMOJ's new UI (/web pages)
- the script's monochrome UI on XMOJ's old/classic pages
- the script's classic UI on XMOJ's new UI (/web pages)
- the script's classic UI on XMOJ's old/classic pages

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Summary by cubic

Updates the footer status indicator to use the XMOJ Script status service and adds a link to its status page.

Hides the indicator when all services are operational and checks for updates every five minutes.

Update the footer service-status integration to point users to the current status service.

New Features:

Bug Fixes:

Update the embedded service-status widget to use the current status domain and configuration.