refactor: remove obsolete configuration file, update flake.lock, and modify package list

config/home-manager/configuration.nix

@@ -1 +0,0 @@
-/home/menno/dotfiles/config/nixos/configuration.nix

config/home-manager/flake.lock

@@ -23,11 +23,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1738163270,
-        "narHash": "sha256-B/7Y1v4y+msFFBW1JAdFjNvVthvNdJKiN6EGRPnqfno=",
+        "lastModified": 1739055578,
+        "narHash": "sha256-2MhC2Bgd06uI1A0vkdNUyDYsMD0SLNGKtD8600mZ69A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "59e618d90c065f55ae48446f307e8c09565d5ab0",
+        "rev": "a45fa362d887f4d4a7157d95c28ca9ce2899b70e",
         "type": "github"
       },
       "original": {
@@ -39,11 +39,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1738142207,
-        "narHash": "sha256-NGqpVVxNAHwIicXpgaVqJEJWeyqzoQJ9oc8lnK9+WC4=",
+        "lastModified": 1739020877,
+        "narHash": "sha256-mIvECo/NNdJJ/bXjNqIh8yeoSjVLAuDuTUzAo7dzs8Y=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "9d3ae807ebd2981d593cddd0080856873139aa40",
+        "rev": "a79cfe0ebd24952b580b1cf08cd906354996d547",
         "type": "github"
       },
       "original": {

config/home-manager/packages/workstation/packages.nix

@@ -25,7 +25,6 @@
     ## Chat Apps
     betterdiscordctl
     vesktop
-    signal-desktop
 
     ## Multimedia
     plex-media-player

config/home-manager/packages/workstation/php.nix

@@ -0,0 +1,6 @@
+{ pkgs, ... }:
+{
+  home.packages = with pkgs; [
+    php83
+  ];
+}