refactor(nix): extract common system configs into reusable modules

Create 6 new NixOS modules to reduce duplication across system configs:
- hardware/wooting: Wooting keyboard udev rules and Bluetooth compat
- services/nginx-base: Common nginx server settings
- services/acme-base: ACME certificate defaults
- services/xremap: Key remapping with sensible defaults
- system/no-sleep: Disable sleep/suspend/hibernate targets
- system/kernel-tweaks: PM freeze timeout and zram configuration

Update system configuration files to use these new modules.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

systems/x86_64-linux/sgx/nginx.nix

@@ -3,22 +3,7 @@
   ...
 }:
 {
-  users.users.nginx.extraGroups = [ "acme" ];
-  services.nginx = {
-    enable = true;
-    clientMaxBodySize = "1000M";
-    appendHttpConfig = ''
-      log_format vcombined '$host:$server_port '
-              '$remote_addr - $remote_user [$time_local] '
-              '"$request" $status $body_bytes_sent '
-              '"$http_referer" "$http_user_agent"';
-      access_log /var/log/nginx/access.log vcombined;
-    '';
-    recommendedGzipSettings = true;
-    recommendedOptimisation = true;
-    recommendedProxySettings = true;
-    recommendedTlsSettings = true;
-    virtualHosts = {
+  services.nginx.virtualHosts = {
       "openwebui.hoyer.world" = {
         enableACME = false;
         useACMEHost = "internal.hoyer.world";
@@ -48,5 +33,4 @@
         };
       };
     };
-  };
 }