Remove unused configurations and packages from laptop setup

- Removed USBGuard configuration and its associated comments from configuration.nix.
- Cleaned up flake.nix by removing unnecessary overlays.
- Updated home.nix to remove references to Helium and Proton, and added Steam.
- Deleted secrets.default.nix and secrets.secrets.yaml files for security reasons.
- Removed Omen laptop specific configuration from omen.nix.
- Deleted vencord.nix as it is no longer needed.

home/programs/group/dev-packages.nix

@@ -4,14 +4,16 @@
 }:
 (with pkgs; [
   go
-  #claude-code
+	zig
+
+	zed-editor #Zed
+	vscodium # VS Code
 ])
 ++ (with pkgs-stable; [
-  nodejs
-  air
-  duckdb
+  bun
   python3
   jq
-  nix-prefetch-github
   rsync
+	rustc
+	cargo
 ])