[DOCS] Architecture Diagrams

[brooksmtownsend]

We have a few architecture diagrams in the quickstart that should be reevaluated for relationships (how to represent the lattice vs host) and we have additional need on our concepts page for more diagrams for how things relate.

As a rule of thumb, if we're introducing a new concept, we should have a diagram showing how it all relates. Over the quickstart it could be helpful to have an evolving diagram with increasing complexity