Update Hugo and theme with modern improvements

- Updated Hugo from v0.115.4 to v0.150.0 (latest)
- Updated m10c theme to latest version (8 commits)
- Fixed deprecated resources.ToCSS → css.Sass function
- Upgraded social icons to use brand-specific Simple Icons
- Added RSS feed autodiscovery support
- Improved icon consistency across all social platforms

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

layouts/_default/baseof.html

@@ -8,7 +8,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="author" content="{{ .Site.Params.author | default "John Doe" }}" />
     <meta name="description" content="{{ if .IsHome }}{{ .Site.Params.description }}{{ else }}{{ .Description }}{{ end }}" />
-    {{ $style := resources.Get "css/main.scss" | resources.ExecuteAsTemplate "css/main.scss" . | resources.ToCSS | resources.Minify | resources.Fingerprint -}}
+    {{ $style := resources.Get "css/main.scss" | resources.ExecuteAsTemplate "css/main.scss" . | css.Sass | resources.Minify | resources.Fingerprint -}}
     <link rel="stylesheet" href="{{ $style.RelPermalink }}" />
     {{ range .AlternativeOutputFormats -}}
       {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .Permalink $.Site.Title | safeHTML }}