fix: update import names — nse → nse_orchestrator, nostrcal → nostrcalendar

Fixes code examples on landing page and OpenClaw docs to match
the current package import names after the coordinated rename.

Author: vveerrgg

docs/index.html

@@ -329,7 +329,7 @@ <h1>Sovereign Identity<br>for <span>Both Sides</span></h1>
       <div class="code-block">
         <span class="comment"># One install. Five pillars. Both sides sovereign.</span><br>
         pip install <span class="fn">nse-orchestrator</span>[all]<br><br>
-        <span class="kw">from</span> nse <span class="kw">import</span> <span class="fn">SovereignEntity</span><br><br>
+        <span class="kw">from</span> nse_orchestrator <span class="kw">import</span> <span class="fn">SovereignEntity</span><br><br>
         <span class="comment"># The entity detects installed pillars automatically</span><br>
         entity = <span class="fn">SovereignEntity</span>.<span class="fn">create</span>(owner_name=<span class="str">"vergel"</span>)<br><br>
         <span class="comment"># Cross-pillar awareness &mdash; no single pillar sees this</span><br>