Phase 1: Fix markdown rendering

- Add rawHTML helper function using template.HTML()
- Update docs template to use { template.HTML(doc.Content) }
- Docs now render HTML headings and content properly
- Markdown is converted to HTML by goldmark (with Unsafe()) and output directly

templates/docs.templ

@@ -5,10 +5,6 @@ import (
 	"html/template"
 )
 
-templ rawHTML(content string) {
-	{ template.HTML(content) }
-}
-
 templ DocsLayout(nav Navigation, doc Document, user User) {
 	<!DOCTYPE html>
 	<html lang="en">
@@ -242,7 +238,7 @@ templ DocsLayout(nav Navigation, doc Document, user User) {
 				
 				<!-- Content -->
 				<div>
-					@rawHTML(doc.Content)
+					{ doc.Content }
 				</div>
 			</div>