[docs] Document newly added device map page features

[dee077]

This documentation task covers the upcoming features related to enhanced device map page features.
Aiming to provide clear usage instructions and technical details for developers and users.

Features to Document

1. Dedicated device map page: #562
   A new standalone page that displays all devices on a map without dashboard UI constraints, improving usability and interaction.

2. Indoor map drill-down: 564
   Functionality to zoom into indoor locations with floorplans, supporting multiple floors, and showing all devices on each floor.

3. Device page map URL: 562
   Adds URLs on device pages to link directly to the dedicated map view or the indoor map, centering and zooming on the selected device.

4. Mobile coordinates tracking: 563
   Enables dynamic location updates for devices with mobile coordinates using WebSockets, providing real-time device movement on the map.

All the screenshots of the UI should be up to date.

[pandafy]

@dee077 the documentation will complement the feature in every PR. Though, we can keep this issue for tracking that we have documented everything.

[nemesifier]

@dee077 we need to ensure the screenshots of the UI are up to date.