feat: add calendar and contacts modules

modules/profiles/personal_contacts.nix

@@ -0,0 +1,50 @@
+{ lib
+, config
+, pkgs
+, ...
+}:
+
+with lib;
+let
+  cfg = config.my.profiles.personal;
+in
+{
+  options.my.profiles.personal.contacts = mkEnableOption "contacts";
+
+  config = mkIf cfg.contacts {
+    home-manager.users.moritz = {
+      programs.khard.enable = true;
+      programs.vdirsyncer.enable = true;
+      services.vdirsyncer.enable = true;
+      programs.aerc.extraConfig.compose.address-book-cmd = "khard email --remove-first-line --parsable %s";
+      accounts.contact = {
+        basePath = "Documents/Contacts";
+        accounts.personal = {
+          local = {
+            type = "filesystem";
+            fileExt = ".vcf";
+          };
+          remote = {
+            passwordCommand = [ "cat" "/run/agenix/nextcloud" ];
+            url = "https://nextcloud.moritzboeh.me/remote.php/dav";
+            type = "carddav";
+            userName = "moritz";
+          };
+          khard.enable = true;
+          khard.defaultCollection = "contacts";
+          vdirsyncer.enable = true;
+          vdirsyncer.collections = [
+            # "z-app-generated--contactsinteraction--recent" # Recently contacted
+            # "z-server-generated--system" # Accounts
+            "contacts" # Contacts
+          ];
+          vdirsyncer.conflictResolution = [ "vimdiff" ];
+        };
+      };
+    };
+    age.secrets.nextcloud = {
+      file = ../../secrets/nextcloud.age;
+      owner = "1000";
+    };
+  };
+}