- add: new lobby and ui tweaks. (#7)

* base

* arrow pointer for buttons

* some progress for text buttons, need cleaning

* fixed observe button, remove fraction

* just for now

* ui tweaks

* more ui tweaks

* feat: ченджлог в лобби

---------

Co-authored-by: Remuchi <RemuchiOfficial@gmail.com>

Content.Client/ParticleAccelerator/UI/ParticleAcceleratorControlMenu.cs

@@ -86,7 +86,7 @@ namespace Content.Client.ParticleAccelerator.UI
             var back = new StyleBoxTexture
             {
                 Texture = panelTex,
-                Modulate = Color.FromHex("#25252A"),
+                Modulate = Color.FromHex("#141414"),
             };
             back.SetPatchMargin(StyleBox.Margin.All, 10);