Fix card icons and replace logo across documentation

- Fix invalid Material Design Icons in provenance.md reference cards
- Replace old 'Semantica Updated Logo.png' with new 'Semantica Logo.png'
- Update README.md, docs/index.md, and docs/DOCS_README.md logo references
- Remove old logo files and add new logo to docs assets
- All documentation now uses consistent, valid icons and new branding

README.md

@@ -1,6 +1,6 @@
 <div align="center">
 
-<img src="Semantica Updated Logo.png" alt="Semantica Logo" width="460"/>
+<img src="Semantica Logo.png" alt="Semantica Logo" width="460"/>
 
 # 🧠 Semantica
 ### Open-Source Semantic Layer & Knowledge Engineering Framework

docs/DOCS_README.md

@@ -46,7 +46,7 @@ semantica/
 │   │   └── custom.css   # Custom styling
 │   └── assets/
 │       └── img/
-│           └── Semantica Updated Logo.png
+│           └── Semantica Logo.png
 └── site/                # Generated site (created by mkdocs build)
 ```
 

docs/index.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/img/Semantica Updated Logo.png" alt="Semantica Logo" width="450" height="auto">
+  <img src="assets/img/Semantica Logo.png" alt="Semantica Logo" width="450" height="auto">
   
   <h1>🧠 Semantica</h1>
   

docs/reference/provenance.md

@@ -20,7 +20,7 @@ The Semantica provenance module provides W3C PROV-O compliant tracking for knowl
 
     All 17 Semantica modules integrated for comprehensive tracking
 
--   :material-source-document:{ .lg .middle } **Source Tracking**
+-   :material-file-document:{ .lg .middle } **Source Tracking**
 
     ---