upgrade to nixos 25.11

- thefuck has been removed, use pay-repects instead
- 'glxinfo' has been renamed to/replaced by 'mesa-demos'
- options have been moved out of the 'xserver' namespace
- use default mesa drivers, remove amdvlk
- systemd global config has been moved and is not string-based anymore
- git settings have been moved to sub-attrset
- ssh default options generate a warning now but are not needed -> disable
- unpin nixpkgs version for servicepoint flakes

homeConfigurations/vinzenz/default.nix

@@ -42,7 +42,7 @@
         ];
       };
 
-      thefuck = {
+      pay-respects = {
         enable = true;
         enableZshIntegration = true;
       };

homeConfigurations/vinzenz/git.nix

@@ -1,15 +1,17 @@
 {
   config.programs.git = {
     enable = true;
-    userName = "Vinzenz Schroeter";
-    userEmail = "vinzenz.f.s@gmail.com";
+    settings = {
+      user = {
+        name = "Vinzenz Schroeter";
+        email = "vinzenz.f.s@gmail.com";
+      };
 
-    aliases = {
-      prettylog = "log --pretty=oneline --graph";
-      spring-clean = "!git branch --merged | xargs -n 1 -r git branch -d";
-    };
+      aliases = {
+        prettylog = "log --pretty=oneline --graph";
+        spring-clean = "!git branch --merged | xargs -n 1 -r git branch -d";
+      };
 
-    extraConfig = {
       pull.ff = "only";
       merge.tool = "kdiff3";
       push.autoSetupRemote = "true";

homeConfigurations/vinzenz/ssh.nix

@@ -1,6 +1,7 @@
 {
   config.programs.ssh = {
     enable = true;
+    enableDefaultConfig = false;
     matchBlocks = {
       "vpn2" = {
         host = "vpn2 hetzner-vpn2";