feat(links): add an option for external link decoration (#780)

* chore: add icons

* feat: add option to flag outbound links

* chore: generate

* docs: add configuration

* chore: use with the example site

* chore: use one icon with rotation

exampleSite/hugo_stats.json

@@ -159,6 +159,7 @@
       "hx:active:shadow-gray-200",
       "hx:active:shadow-sm",
       "hx:align-[-2.5px]",
+      "hx:align-baseline",
       "hx:align-middle",
       "hx:align-text-bottom",
       "hx:appearance-none",
@@ -602,6 +603,7 @@
       "hx:rtl:pr-5",
       "hx:rtl:pr-6",
       "hx:rtl:pr-8",
+      "hx:rtl:rotate-270",
       "hx:rtl:text-left",
       "hx:scroll-my-6",
       "hx:scroll-py-6",