feat: migrate Hugo Bootstrap theme to latest Hugo with Tailwind CSS and refactor codebase

* replace Bootstrap-based styling with Tailwind CSS
* update theme compatibility for latest Hugo version
* refactor templates and partials
* fix outdated code and broken components
* improve project structure and maintainability
* optimize styling and frontend build setup

assets/css/main.css

@@ -0,0 +1,33 @@
+@import "tailwindcss";
+@plugin "@tailwindcss/forms";
+@plugin "@tailwindcss/typography";
+@plugin 'tailwind-bootstrap-grid';
+@source "hugo_stats.json";
+
+/* Auto-generated theme from "data/theme.json"*/
+@import "./generated-theme.css";
+
+@import "./safe.css";
+@import "./utilities.css";
+
+@layer base {
+  @import "./base.css";
+}
+
+@layer components {
+  @import "./components.css";
+  @import "./navigation.css";
+  @import "./buttons.css";
+}
+
+@import "social-share.css";
+@import "gallery-slider.css";
+@import "images.css";
+@import "toc.css";
+@import "tab.css";
+@import "accordion.css";
+@import "modal.css";
+@import "notice.css";
+
+@import "module-overrides.css";
+@import "custom.css";