Document H5 Architecture Plans

[trieloff]

Draft of the architecture as discussed in the NYC ops workshop. As much of this is still WIP, I've opted for a separate document instead of an overhaul of the existing architecture

Most convenient way to read is here https://github.com/adobe/helix-home/blob/nyc-workshop/docs/architecture-v5.md

• docs(architecture): wip of H5 architecture
• docs(architecture): cleanup layout in fastly architecture
• docs(architecture): restore groups in F4 architecture
• docs(architecture): update H5 chart
• docs(architecture): describe plans for H5
• docs(architecture): formatting

[synox]

A table is not rendered correctly on https://github.com/adobe/helix-home/blob/main/docs/architecture-v5.md

it shows Name | Domain | Description | | RUM