feat: add more e2e tests for MPR and add test mode and extension (#3180)

* tests: add various e2e tests for MPR and measurements

wip

add cypress config

feat: add mode and extension for testing

add hp applied through search params

add MPR tests

apply review comments

add more e2e tests

update yarn lock

* fix unit tests failing

extensions/test-extension/README.md

@@ -0,0 +1,4 @@
+# Test Extension
+This extension will provide uitlities and module to help with testing. It is not intended to be used in production.
+For instance, we can use the hanging protocol module to inject a hanging protocol into the core and later
+use it to test the hanging protocol detection mechanism.