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* fix outdated code and broken components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/base.css

@@ -0,0 +1,62 @@
+html {
+  @apply text-base-sm md:text-base;
+}
+
+body {
+  @apply bg-body text-base font-primary font-normal leading-relaxed text-text overflow-x-hidden;
+}
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  @apply font-secondary font-bold leading-tight text-text-dark;
+  span {
+    @apply text-primary;
+  }
+}
+
+h1,
+.h1 {
+  @apply text-h1-sm md:text-h1;
+}
+
+h2,
+.h2 {
+  @apply text-h2-sm md:text-h2;
+}
+
+h3,
+.h3 {
+  @apply text-h3-sm md:text-h3;
+}
+
+h4,
+.h4 {
+  @apply text-h4;
+}
+
+h5,
+.h5 {
+  @apply text-h5;
+}
+
+h6,
+.h6 {
+  @apply text-h6;
+}
+
+b,
+strong {
+  @apply font-semibold;
+}
+
+code {
+  @apply after:border-none;
+}
+
+blockquote > p {
+  @apply !my-0;
+}