migrate to decoupled Blowfish layout, fix TOC scrollspy, and update docs

- Theme Decoupling & Cleanup:
      - Fully decoupled and vendored the Blowfish theme directly into root directories (layouts/,
  assets/, static/, data/, i18n/).
      - De-registered and cleaned up legacy Git submodules (themes/blowfish, themes/hugo-admonitions)
  from the Git index to protect the build from upstream breakages.
      - Configured .gitignore to ignore development preview symlinks (content, static,
  config/_default/menus.en.toml), build folders (public/, resources/), and locks.

    - TOC & Layout Fixes:
      - Replaced the custom layouts/_default/single.html template with the Blowfish default to restore
  native container widths and the side-by-side flex layout.
      - Restored TOC to float on the right sidebar on desktop viewports and render inline on mobile
  viewports.
      - Fixed a parameter resolution bug in layouts/partials/toc.html by checking both .Site.Params.
  smartTOC and .Site.Params.article.smartTOC (where it is defined in params.toml).
      - Upgraded the TOC scrollspy JavaScript to target all '#TableOfContents' containers on the page,
  enabling highlight tracking on both desktop and mobile layouts.

    - Documentation Updates (README.md):
      - Restored YAML front matter metadata block at the top.
      - Added detailed notes on the CI/CD build process and Gitea runner deployment targets
  (/srv/www/docs-public and /srv/www/docs-private).
      - Added a categorized and sorted "Shortcodes Quick Reference" table at the top of the shortcodes
  section (ordered by Custom, Hugo Default, and Blowfish).
      - Documented custom shortcodes (Include, Screenshot, Raw HTML) and missing Hugo default
  shortcodes (Highlight, Instagram, Param, Ref, Relref, Twitter, Vimeo, Youtube).
      - Restructured headings to ensure all sub-shortcodes are H3, removed block break tags (<br/>),
  and appended horizontal separators (---) after H2 sections.

layouts/partials/home/profile.html

@@ -0,0 +1,47 @@
+{{ $disableImageOptimization := .Site.Params.disableImageOptimization | default false }}
+<article
+  class="{{ if not .Site.Params.homepage.showRecent }}
+    h-full
+  {{ end }} flex flex-col items-center justify-center text-center">
+  <header class="relative px-1 py-1 flex flex-col items-center mb-3">
+    {{ with .Site.Params.Author.image }}
+      {{ $authorImage := "" }}
+      {{ if or (strings.HasPrefix . "http:") (strings.HasPrefix . "https:") }}
+        {{ $authorImage = resources.GetRemote . }}
+      {{ else }}
+        {{ $authorImage = resources.Get . }}
+      {{ end }}
+      {{ if $authorImage }}
+        {{ $final := $authorImage }}
+        {{ $squareImage := $authorImage }}
+        {{ if not (or $disableImageOptimization (eq $authorImage.MediaType.SubType "svg")) }}
+          {{ $final = $authorImage.Fill (print "288x288 q" ( $.Site.Params.Author.imagequality | default "96" )) }}
+          {{ $shortSide := int (math.Min $authorImage.Width $authorImage.Height) }}
+          {{ $squareImage = $authorImage.Crop (printf "%dx%d" $shortSide $shortSide ) }}
+        {{ end }}
+        <img
+          class="mb-2 h-36 w-36 rounded-full"
+          width="144"
+          height="144"
+          alt="{{ $.Site.Params.Author.name | default `Author` }}"
+          src="{{ $final.RelPermalink }}"
+          data-zoom-src="{{ $squareImage.RelPermalink }}">
+      {{ end }}
+    {{ end }}
+    <h1 class="text-4xl font-extrabold">
+      {{ .Site.Params.Author.name | default .Site.Title }}
+    </h1>
+    {{ with .Site.Params.Author.headline }}
+      <h2 class="text-xl text-neutral-500 dark:text-neutral-400">
+        {{ . | markdownify }}
+      </h2>
+    {{ end }}
+    <div class="mt-1 text-2xl">
+      {{ partialCached "author-links.html" . }}
+    </div>
+  </header>
+  <section class="prose dark:prose-invert w-full">{{ .Content }}</section>
+</article>
+<section>
+  {{ partial "recent-articles/main.html" . }}
+</section>