Add declarative obsidian config base

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

hosts/common/user/configs/gui/obsidian/default.nix

@@ -0,0 +1,39 @@
+{
+  user ? throw "user argument is required",
+}:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  home-manager.users.${user.name} = {
+    imports = [ ./options.nix ];
+
+    programs.obsidian = {
+      enable = true;
+
+      sharedSettings = {
+        corePlugins = [
+          "bookmarks"
+          "canvas"
+          "command-palette"
+          "editor-status"
+          "file-explorer"
+          "global-search"
+          "graph"
+          "note-composer"
+          "outgoing-link"
+          "outline"
+          "page-preview"
+          "slash-command"
+          "switcher"
+          "tag-pane"
+        ];
+      };
+    };
+
+    home.persistence."/cache${user.home}".directories = [ ".config/obsidian" ];
+  };
+}