Split Shimmer Capture into its own repository, leaving a redirect

[marknolan]

Shimmer Capture now lives in its own repository:
ShimmerResearch/shimmer-capture-web
→ https://shimmerresearch.github.io/shimmer-capture-web/

It was extracted with git filter-repo, so its history went with it — 259 of
this repository's 546 commits, everything that ever touched the page. Blame
still works on a 5,600-line file whose comments are most of its value.

This PR is the other half: the redirect, and the tidy-up here.

The redirect

ShimmerCapture/index.html is now a stub. Pages serves static files and cannot
issue a 301, so it redirects three ways, each covering a case the others do not:

	covers
<meta http-equiv="refresh">	JavaScript disabled
location.replace()	fires sooner, and replaces the history entry so Back returns where the visitor came from instead of bouncing them forward again
a visible link	both of the above blocked

?mock=1 and any fragment are carried across, because those links are in
circulation. rel="canonical" is the part that matters beyond today — it is
what moves the search result, rather than leaving two competing.

Please don't delete the stub to tidy up. Every link published while the page
lived at /webBLEDemos/ShimmerCapture/ points at it.

What else moved, and why

• common/ — the twenty-module UI library. It reads as shared code and is
  named like it, but nothing else here imported it; no other demo loads so much
  as common/theme.css. I checked all nine demos and the extension. Kept here
  it would have been maintained for one consumer in another repository; copied,
  it would have drifted.
• .github/workflows/verify.yml — titled Verify ShimmerCapture and ran
  nothing else. html-format.yml stays and still covers every page here.

What stayed

vendor/ — eighteen pages and the Chrome extension still import it, and the
extension still needs its own copy for the store.

The thing most likely to be forgotten

C:\dev\web\sync-all-vendors.ps1 now has a third consumer. The new
repository vendors the same SDK build from the same source, and nothing links
the copies. It is written down in vendor/README.md and AGENTS.md so it is
findable from either side.

Verification

The pass was run against the new layout before the split was committed:
293/293 checks, zero console errors, under VERIFY_STRICT_BASELINE=1 — the
same strictness CI uses, where a check that starts passing fails the build too.

One thing needing a decision

#46 (DEV-711, upload
file functionality) touches only ShimmerCapture/index.html. It was already
CONFLICTING and last updated 2026-08-19, so this PR does not break something
that was working — but it needs re-targeting. The branch has been pushed to the
new repository with its four commits intact, ready to open a PR there.
integration/DEV-948-DEV-949 was carried across for the same reason.

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