refactor: more interactive docs. (#70)

* *finished tabs for
Setting circuit parameters
and Compiling the model
steps.
*renamed Getting Started page to Installing
*renamed Command Line Interface page to
Getting Started

* *implemented EZKL Engine interactive docs
*updated hub docs to reflect api changes

* *added in-browser-evm-verifier tab
*add blog link to top navbar

* *add note
about pre-shaghai compat to docs for
evm verifier