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/meta/views.html

@@ -0,0 +1,25 @@
+<span>
+  {{ $id := "null" }}
+  {{ if eq .Kind "taxonomy" }}
+    {{ $id = delimit (slice "views_taxonomy_" .Page.Data.Plural) "" }}
+  {{ else if eq .Kind "term" }}
+    {{ $id = delimit (slice "views_term_" .Page.Data.Term) "" }}
+  {{ else }}
+    {{ $translations := .AllTranslations }}
+    {{ with .File }}
+      {{ $path := .Path }}
+      {{ range $translations }}
+        {{ $lang := print "." .Language.Name ".md" }}
+        {{ $path = replace $path $lang ".md" }}
+      {{ end }}
+      {{ $id = delimit (slice "views_" $path) "" }}
+    {{ end }}
+  {{ end }}
+  <span
+    id="{{ $id }}"
+    class="animate-pulse inline-block text-transparent max-h-3 rounded-full -mt-[2px] align-middle bg-neutral-300 dark:bg-neutral-400"
+    title="views"
+    >loading</span
+  >
+  <span class="inline-block align-text-bottom">{{ partial "icon.html" "eye" }}</span>
+</span>