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/acme.nix

@@ -7,14 +7,9 @@
     sopsFile = ../../../.secrets/sgx/internetbs.yaml; # bring your own password file
   };
 
-  security.acme = {
-    acceptTerms = true;
-    defaults = {
-      email = "harald@hoyer.xyz";
-      dnsProvider = "cloudflare";
-      credentialsFile = config.sops.secrets.internetbs.path;
-    };
-    certs = {
+  metacfg.services.acmeBase.credentialsFile = config.sops.secrets.internetbs.path;
+
+  security.acme.certs = {
       "internal.hoyer.world" = {
         extraDomainNames = [
           "openwebui.hoyer.world"
@@ -23,5 +18,4 @@
         ];
       };
     };
-  };
 }