Merge upstream/main into feat/strava-icon-v2

Resolve conflicts in icon sample pages by adopting upstream's {{< icon-ref >}}
shortcode, which dynamically generates the icon table (replacing the static
table the PR had added strava to).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/_default/languages.en.toml

@@ -74,4 +74,5 @@ title = "Blowfish"
 #     { youtube = "https://youtube.com/username" },
 #     { ko-fi = "https://ko-fi.com/username" },
 #     { codeberg = "https://codeberg.org/username"},
+#     { printables = "https://www.printables.com/@username"},
 #   ]