Add Plausible to landing page build

[lindellsc]

In order to track web activity, Plausible needs to be added to the build. They go over the process in the documentation here: https://plausible.io/docs/plausible-script, outbound tracking integration docs are here: https://plausible.io/docs/outbound-link-click-tracking.

I've listed the events that need to be tracked (goals) with relevant links in the txt file.

Plaus Goals.txt