feat: add AI tools, improve configs, and update README

Changelog:
- Added AI tools and services (Ollama, SearXNG, Open WebUI)
- Updated README with AI tools section and improved formatting
- Added new Rust tools (`cargo-feature`, `cargo-features-manager`)
- Improved virtualisation config with `nvidia-docker`
- Added new work tools (`ssm-session-manager-plugin`, `redli`)
- Updated Helix, Qutebrowser, and Oterm configs
- Added Open WebUI and SearXNG config files

nixos/virtualisation.nix

@@ -5,30 +5,32 @@
   # virtualisation.containerd.enable = true;
 
   # Enable Docker
-  # virtualisation.docker.enable = true;
-  # virtualisation.docker.rootless = {
+  # virtualisation.docker = {
   #   enable = true;
-  #   setSocketVariable = true;
+  #   rootless = {
+  #     enable = true;
+  #     setSocketVariable = true;
+  #     daemon.settings.features.cdi = true;
+  #   };
   # };
   # users.extraGroups.docker.members = [ "xnm" ];
 
   # Enable Podman
-  virtualisation = {
-    podman = {
-      enable = true;
+  virtualisation.podman = {
+    enable = true;
 
-      # Create a `docker` alias for podman, to use it as a drop-in replacement
-      dockerCompat = true;
-      dockerSocket.enable = true;
+    # Create a `docker` alias for podman, to use it as a drop-in replacement
+    dockerCompat = true;
+    dockerSocket.enable = true;
 
-      # Required for containers under podman-compose to be able to talk to each other.
-      defaultNetwork.settings.dns_enabled = true;
-    };
+    # Required for containers under podman-compose to be able to talk to each other.
+    defaultNetwork.settings.dns_enabled = true;
   };
   environment.variables.DBX_CONTAINER_MANAGER = "podman";
   users.extraGroups.podman.members = [ "xnm" ];
 
   environment.systemPackages = with pkgs; [
+    nvidia-docker
     # nerdctl
 
     # firecracker