Update branch 5.2 to match master (#76)

* Update README.md

Signed-off-by: Luke Bermingham <1215582+lukehb@users.noreply.github.com>

* Added RELEASE_VERSION file which is our global source of truth for what release version the source code should push to.

---------

Signed-off-by: Luke Bermingham <1215582+lukehb@users.noreply.github.com>

README.md

@@ -37,14 +37,16 @@ This repository contains the following in branches that track Unreal Engine vers
 | Branch | Status |
 |--------|--------|
 |[Master](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/master)| Dev |
+|[UE5.2](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.2)| Pre-release |
 |[UE5.1](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.1)| Current |
 |[UE5.0](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE5.0)| Supported |
 |[UE4.27](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE4.27)| End of life |
 |[UE4.26](https://github.com/EpicGames/PixelStreamingInfrastructure/tree/UE4.26)| Unsupported |
 
 | Legend | Meaning |
 |---------|-----------|
-| Dev | This is our dev branch tracking [ue5-main](https://github.com/EpicGames/UnrealEngine/tree/ue5-main) - experimental. |
+| Dev | This is our dev branch, intended to be paired with [ue5-main](https://github.com/EpicGames/UnrealEngine/tree/ue5-main) - experimental. |
+|Pre-release| Code in here will be paired with the next UE release, we periodically update this branch from `master`. |
 | Current | Supported and this is the branch tracking the **latest released** version of UE. |
 | Supported | We will accept bugfixes/issues for this version. |
 | End of life | Once the next UE version is released we will not support this version anymore. |

RELEASE_VERSION

@@ -0,0 +1 @@
+0.0.1