Bump version 0.7.0 / 0.5.0 → 0.8.0 (synced across launcher, updater, installer)

After the auto-update test loop the App was at 0.7.0 and Updater /
Inno Setup were still at 0.5.0. Sync everything to 0.8.0 so a single
version covers the recent batch of branding + UX changes:

- Default installRoot is C:\ASTERION_VR
- ASTERION favicon (window icons + .exe icon + Setup icon)
- ASTERION wordmark left of PROSERVE in the top bar
- Centered, readable "© 2026 ASTERION VR — Tous droits réservés" pill
- Window control hover in blue (was unreadable yellow)
- Background image anchored bottom-right so the brand mark doesn't
  get cropped on resize or hidden by the download footer
- Launcher window minimizes when a Proserve version is launched

Next time the operator pushes a release, "Définir" 0.8.0 in the
backoffice → upload PSLauncher-0.8.0.exe → click the blue Sync.
Existing 0.7.0 launchers will then auto-update to 0.8.0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/PSLauncher.App/PSLauncher.App.csproj

@@ -15,9 +15,9 @@
     <Product>PROSERVE Launcher</Product>
     <Copyright>© 2026 ASTERION VR — All rights reserved</Copyright>
     <RootNamespace>PSLauncher.App</RootNamespace>
-    <Version>0.7.0</Version>
-    <AssemblyVersion>0.7.0.0</AssemblyVersion>
-    <FileVersion>0.7.0.0</FileVersion>
+    <Version>0.8.0</Version>
+    <AssemblyVersion>0.8.0.0</AssemblyVersion>
+    <FileVersion>0.8.0.0</FileVersion>
 
     <!-- Single-file self-contained publish profile (used by `dotnet publish`) -->
     <PublishSingleFile>true</PublishSingleFile>