Take shared-menu.php 1.1.0 and keep its hash in one place

The family froze a new copy of includes/shared-menu.php: 184cebdc, contract
1.1.0. Two changes in it for this plugin, which was still on f4862d5c (1.0.0).

The menu icon is now an infinity sign, painted from admin_head behind a
wpmgr_menu_glyph filter that defaults to it — Kristian asked for it because the
family is called Nolimit. And the file's own header said 1.0.0 while its
constant said 1.1.0, and it counted five plugins where there are six; Nolimit
SEO found both.

Taken today rather than when convenient, and the reason is measured rather than
tidiness: two plugins were on 1.1.0 and three on 1.0.0 at the same time, so a
shop got the glyph or the cog depending on activation order — while every
repository's own hash check was green on its own side. A frozen file is a
family-wide fact, and a green local check says nothing about the shop.

The API change is additive — a new filter and a new function, nothing removed —
so this plugin's use of wpmgr_ensure_menu() and wpmgr_menu_title is unaffected,
and the default glyph means there is nothing to opt into.

The hash now lives once, as WPMGR_MENU_SHA in ci/plugin.conf, checked by
ci/static.sh and required by ci_load_conf so an unset value cannot turn the
comparison into a no-op. It was previously a literal inside tests/smoke.php as
well; two copies of one constant drift, and the copy that drifts is the one
nobody remembers. The runtime assertion that remains proves a different fact —
that the file is loaded at all — because wpmgr_ensure_menu() only exists if it
was.

Proven red by appending one line to the shared file: the check names both
hashes and says not to edit it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ci/lib.sh

@@ -22,7 +22,7 @@ ci_load_conf() {
   # leaves the floors empty, every comparison becomes a no-op, and the hollow
   # checks these were added to fix come back silently — the same shape of bug.
   local missing=
-  for var in PLUGIN_SLUG PLUGIN_MAIN TEXT_DOMAIN NEEDS_WOOCOMMERCE MIN_SHIPPED_PHP_FILES MIN_TRANSLATION_CALLS RELEASE_REPO; do
+  for var in PLUGIN_SLUG PLUGIN_MAIN TEXT_DOMAIN NEEDS_WOOCOMMERCE MIN_SHIPPED_PHP_FILES MIN_TRANSLATION_CALLS RELEASE_REPO WPMGR_MENU_SHA; do
     [ -n "${!var:-}" ] || missing="$missing $var"
   done
   if [ -n "$missing" ]; then