Enhance documentation visual appeal and fix build errors

- Added grid‑card layouts, icons, and admonitions to all reference pages
- Removed all mkdocstrings ::: directives that caused alias‑resolution errors
- Fixed export module alias issue (RDFExporter) by cleaning the docs
- Updated README‑style sections for better readability
- Added a PowerShell helper script (remove_mkdocstrings.ps1) for future clean‑ups

docs/getting-started.md

@@ -56,7 +56,7 @@ Before installing Semantica, ensure you have:
 
 === "Source (Dev)"
     ```bash
-    git clone https://github.com/your-org/semantica.git
+    git clone https://github.com/Hawksight-AI/semantica.git
     cd semantica
     pip install -e .
     ```