Add himalia

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/himalia/users/nick/configs/gui/obsidian/default.nix

@@ -0,0 +1,23 @@
+{
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
+}:
+{ ... }:
+{
+  home-manager.users.${user} = {
+    programs.obsidian.vaults."Documents/Obsidian/master".enable = true;
+
+    services.syncthing.settings.folders.obsidian = {
+      label = "Obsidian";
+      path = "${home}/Documents/Obsidian";
+      devices = [
+        "amalthea"
+        "ganymede"
+      ];
+      maxConflicts = 0;
+    };
+
+    home.file."Documents/Obsidian/.stignore".source =
+      ../../../../../../common/configs/user/gui/obsidian/.stignore;
+  };
+}