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.

config/_default_original/params.toml

@@ -0,0 +1,113 @@
+# -- Theme Options --
+# These options control how the theme functions and allow you to
+# customise the display of your website.
+#
+# Refer to the theme docs for more details about each of these parameters.
+# https://nunocoracao.github.io/blowfish/docs/configuration/#theme-parameters
+
+colorScheme = "github"
+defaultAppearance = "dark" # valid options: light or dark
+autoSwitchAppearance = true
+
+enableSearch = true
+enableCodeCopy = true
+customCSS = true
+
+# mainSections = ["section1", "section2"]
+# robots = ""
+
+[header]
+  layout = "fixed" # valid options: basic, fixed
+
+[footer]
+ # showMenu = true
+  showCopyright = true
+  showThemeAttribution = true
+  showAppearanceSwitcher = true
+  showScrollToTop = true
+
+[homepage]
+  layout = "background" # valid options: page, profile, hero, card, background, custom
+  homepageImage = "me/me_stream_doom.PNG" # used in: hero, and card
+  showRecent = false
+  showRecentItems = 5
+  showMoreLink = false
+  showMoreLinkDest = "/posts"
+  cardView = false
+  cardViewScreenWidth = false
+  layoutBackgroundBlur = false # only used when layout equals background
+
+[search]
+  enable = true
+  type = "fuse"
+  showPercent = true
+  showWidth = true
+
+[article] # https://blowfish.page/docs/configuration/
+  showDate = true
+  showViews = false
+  showLikes = false
+  showDateUpdated = true
+  showHero = true
+  heroStyle = "basic" # valid options: basic, big, background
+  showBreadcrumbs = true
+  showDraftLabel = true
+  seriesOpened = true
+  showHeadingAnchors = true
+  showPagination = true
+  invertPagination = false
+  showReadingTime = true
+  showTableOfContents = true
+  showTaxonomies = true 
+  showWordCount = true
+  showSummary = true
+  sharingLinks = [ "linkedin", "twitter", "whatsapp", "pinterest", "reddit", "facebook", "email"]
+  showAuthor = true
+  showAuthorsBadges = true # This helps style the author profile
+  showEdit =  true
+  showEditURL = true
+  editAppendPath = true
+  showZenMode = false
+  smartTOC = true
+
+[list]
+  showBreadcrumbs = true
+  showSummary = true
+  showTableOfContents = true
+  showCards = true
+  groupByYear = true
+  cardView = true
+  cardViewScreenWidth = false
+  columnCount = 3
+  showReadMore = true
+
+[sitemap]
+  excludedKinds = []
+
+[taxonomy]
+  showTermCount = true
+
+[firebase]
+  # apiKey = "XXXXXX"
+  # authDomain = "XXXXXX"
+  # projectId = "XXXXXX"
+  # storageBucket = "XXXXXX"
+  # messagingSenderId = "XXXXXX"
+  # appId = "XXXXXX"
+  # measurementId = "XXXXXX"
+
+[fathomAnalytics]
+  # site = "ABC12345"
+  # domain = "llama.yoursite.com"
+
+[verification]
+  # google = ""
+  # bing = ""
+  # pinterest = ""
+  # yandex = ""
+
+[app]
+  # Some versions of Blowfish look for 'mainIcon' or 'themeIcon'
+  # Try both if one fails.
+  mainIcon = "icons/icon.svg" 
+  themeIcon = "icons/icon.svg"