feat(Docs): Add more to the syntax guide for the template.
feat(Docs): Add more to the syntax guide for the template.

Still a WIP, so feel free to suggest changes if something is *wrong*, but if anything is missing I'd prefer a CL adding to the guide over comments on what to add ;)

PiperOrigin-RevId: 249482817

matanlurey/angular,matanlurey/angular,matanlurey/angular,angulardart/angular,angulardart/angular,angulardart/angular