gaming improvements

- switched to cachyos-bore kernel from mainline lts kernel
- pinned mesa version at 25 to fix issues with minecraft shaders
- switched steam to use the flatpak, since native steam wouldn't launch with the downgraded mesa version

global-configs/zsh.nix

@@ -20,9 +20,5 @@
         "zdharma-continuum/fast-syntax-highlighting"
       ];
     };
-
-    localVariables = {
-      PATH = "/home/grey/.local/bin:$PATH";
-    };
   };
 }