feat(assets): bundle runtime assets and vendor dependencies

vendor/yomitan/css/background.css

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023-2025  Yomitan Authors
+ * Copyright (C) 2022  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* stylelint-disable declaration-no-important */
+#clipboard-rich-content-paste-target * {
+    background-image: none !important;
+    list-style-image: none !important;
+    content: none !important;
+    cursor: auto !important;
+    border-image-source: none !important;
+    offset-path: none !important;
+    -webkit-mask-image: none !important;
+    mask-image: none !important;
+}
+/* stylelint-enable declaration-no-important */