Add unsandbox trademark and free software link to home page

- Add unsandbox to reserved trademarks list on software page
- Remove WASM from unsandbox description
- Add tasteful "free software" link below tagline on home page

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

let-us-define-a-permacomputer/index.html

@@ -81,6 +81,7 @@ The "head" tag holds "meta data" on how various clients should render or display
 <!-- the unturf. logo in all it's raw & full definition glory! -->
 <center><a href="/"><h1 style="font-family: 'chunkfiveregular'; margin-bottom: 0px;" >unturf.</h1></a></center>
 <center><h3>grow food not lawn</h3></center>
+<center><small><a href="/software/">free software</a></small></center>
 
 <!--