web: rollback dependabot context (#7479)

* web: break circular dependency between AKElement & Interface.

This commit changes the way the root node of the web application shell is
discovered by child components, such that the base class shared by both
no longer results in a circular dependency between the two models.

I've run this in isolation and have seen no failures of discovery; the identity
token exists as soon as the Interface is constructed and is found by every item
on the page.

* web: fix broken typescript references

This built... and then it didn't?  Anyway, the current fix is to
provide type information the AkInterface for the data that consumers
require.

* web: rollback dependabot's upgrade of context

The most frustrating part of this is that I RAN THIS, dammit, with the updated
context and the current Wizard, and it finished the End-to-End tests without
complaint.

web/package.json

@@ -39,7 +39,7 @@
         "@formatjs/intl-listformat": "^7.5.0",
         "@fortawesome/fontawesome-free": "^6.4.2",
         "@goauthentik/api": "^2023.10.2-1698526374",
-        "@lit-labs/context": "^0.5.1",
+        "@lit-labs/context": "^0.4.0",
         "@lit-labs/task": "^3.1.0",
         "@lit/localize": "^0.11.4",
         "@open-wc/lit-helpers": "^0.6.0",