[DOC] - Update Dashboard docs and images

[Devon-White]

Product has requested us for the docs to reflect the new & hybrid UI.
(Previous ticket)

UI versions

UI	Release	Description	Enabled space flags
New	In production	Affects all new Spaces. Fully redesigned, minimal UI.	dashboard_ux_new call_fabric_ui_neon show_call_fabric_ui_subscribers ai_agents_ux_new click_to_call
Hybrid	"Soon"	Legacy customers see a call fabric preview, with the option to enable "new call fabric settings" when editing phone routes, domain apps, or SIP endpoints. These users can continue to use the original pages/assignment methods. Hybrid mode may only be rolled out to a subset of existing customers - TBD	call_fabric_ui_neon show_call_fabric_resource_picker show_call_fabric_ui_subscribers ai_agents_ux_new The new AI Agent UI may be included in the Hybrid UI - TBD
Legacy	In production	Existing Spaces	No UI flags enabled

UI version / docs matrix

Spreadsheet