Latest news + banner, cypress tests, open source copy, general style tweaks (#13)

* Adding latest news and banners

* Adding first draft of cypress specs and github actions workflow

* Adding sticky position for top banner

* Tweak styles for new latest news section

* Tweak styles for text__layout innerHTML

* Fix Cypress homepage test spec

* Fix mobile navi z-index with sticky top banner

* Fix sticky banner z-index bug with mobile navi

* Refactor markdown tools to support pages beyond developer docs

* Adjust TADHACK text max-widths for small mobile

* initial changes for open source copy

* more copy

* more copy

* updated open source structure

* minor

* typo

* more copy

* Adjust styles for Open Source markdown small text

* Update readme and remove floats from docs webhooks markdown

* Add readme notes on Cypress and flesh out navi spec tests

* Fix main navi highlight when on sub-sections of markdown pages

Co-authored-by: Dave Horton <daveh@beachdognet.com>

markdown/docs/tutorials/simwood.md

@@ -0,0 +1,7 @@
+# Using Simwood as a Carrier
+
+[Simwood](https://simwood.com) is an innovative company providing an array of telecoms service in the UK, Europe and the UK, including a wholesale SIP trunking service that is perfectly suited for use with jambonz.  This video shows you how to plug in Simwood as your preferred carrier for your jambonz.org account.
+
+<div class="video-wrap">
+  <iframe width="560" height="315" src="https://www.youtube.com/embed/nTDSAebFPQU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+</div>