Move forgejo from alexandria to trantor

Migrated forgejo service and configuration to trantor. Added nginx reverse
proxy support on trantor with ACME configuration for SSL certificates.

Fixed vaultwarden domain in shared services from vault.baduhai.dev to
pass.baduhai.dev to match actual nginx configuration.

hosts/trantor/forgejo.nix

@@ -0,0 +1,34 @@
+{
+  config,
+  lib,
+  inputs,
+  ...
+}:
+let
+  utils = import ../../utils.nix { inherit inputs lib; };
+  inherit (utils) mkNginxVHosts;
+in
+{
+  services.forgejo = {
+    enable = true;
+    repositoryRoot = "/data/forgejo";
+    settings = {
+      session.COOKIE_SECURE = true;
+      server = {
+        PROTOCOL = "http+unix";
+        DOMAIN = "git.baduhai.dev";
+        ROOT_URL = "https://git.baduhai.dev";
+        OFFLINE_MODE = true; # disable use of CDNs
+        SSH_DOMAIN = "baduhai.dev";
+      };
+      log.LEVEL = "Warn";
+      mailer.ENABLED = false;
+      actions.ENABLED = false;
+    };
+  };
+
+  services.nginx.virtualHosts = mkNginxVHosts {
+    domains."git.baduhai.dev".locations."/".proxyPass =
+      "http://unix:${config.services.forgejo.settings.server.HTTP_ADDR}:/";
+  };
+}