Feature/tile actors docs

[olmpya12]

Fixes: #

About

This PR adds optional tile-map support classes to the Unreal ProjectAirSim plugin and documents how to use them with QGroundControl custom maps.

Included changes:

• Added ATileCameraActor
• Added ATileHttpServerActor
• Added UTileMercatorLibrary
• Added HTTPServer module dependency in ProjectAirSim.Build.cs
• Added UE 5.2 compatibility-focused adjustments in tile HTTP response/compression handling
• Added docs/tile_actors.md with setup and usage instructions
• Updated docs/index.md to include the new tile actors doc page
• Updated docs/use_plugin.md to link to the tile actors guide
• Added documentation image: docs/images/tiles/tile_actors_overview.jpg

How Has This Been Tested?

• Verified module dependencies, includes, and Unreal class structure in plugin source.
• Reviewed UE 5.2-sensitive HTTP and image-compression usage paths for compatibility.
• Full Unreal Editor compile/runtime test was not executed in this environment.
• Final validation should be performed by building and running the Blocks project with UE 5.2.

Screenshots and videos (if appropriate)

• docs/images/tiles/tile_actors_overview.jpg