Rebrand various CI scripts and modules

This replaces Riot with Element in various CI scripts, modules, parameters, etc.
This _should_ be the last major rebranding pass (hopefully).

Fixes https://github.com/vector-im/element-web/issues/14894

scripts/ci/layered.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Creates an environment similar to one that element-web would expect for
+# development. This means going one directory up (and assuming we're in
+# a directory like /workdir/matrix-react-sdk) and putting element-web and
+# the js-sdk there.
+
+cd ../  # Assume we're at something like /workdir/matrix-react-sdk
+
+# Set up the js-sdk first
+matrix-react-sdk/scripts/fetchdep.sh matrix-org matrix-js-sdk
+pushd matrix-js-sdk
+yarn link
+yarn install
+popd
+
+# Now set up the react-sdk
+pushd matrix-react-sdk
+yarn link matrix-js-sdk
+yarn link
+yarn install
+popd
+
+# Finally, set up element-web
+matrix-react-sdk/scripts/fetchdep.sh vector-im element-web
+pushd element-web
+yarn link matrix-js-sdk
+yarn link matrix-react-sdk
+yarn install
+yarn build:res
+popd