Address PR review comments for hooks implementation

- Fix getResourceType() to match relative paths like hooks/<name>/README.md
  and skills/<name>/SKILL.md using regex instead of string includes
- Extract hook events from hooks.json via parseHookMetadata() instead of
  non-existent frontmatter.event field in plugin README generation
- Update AGENTS.md to describe hooks as folder-based (README.md + hooks.json)
  instead of .hook.md files
- Update session-logger README to accurately reflect what scripts log
  (remove references to sessionId, duration, prompt content)

website/src/scripts/utils.ts

@@ -503,5 +503,7 @@ export function getLastUpdatedHtml(isoDate: string | null | undefined): string {
     return `<span class="last-updated">Updated: Unknown</span>`;
   }
 
-  return `<span class="last-updated" title="${escapeHtml(fullDate)}">Updated ${relativeTime}</span>`;
+  return `<span class="last-updated" title="${escapeHtml(
+    fullDate
+  )}">Updated ${relativeTime}</span>`;
 }