Updates version and improves diagram styling

Bumps application version to 0.3.0 for new features or fixes.
Enhances README diagram styling for better readability in both
light and dark GitHub themes by adjusting colors and adding
text color contrast.

Author: kjanat

README.md

@@ -44,15 +44,14 @@ flowchart TD
     IEXPORTER -.-> HTML
     IEXPORTER -.-> DOCX
     IFACTORY[ExporterFactory Interface<br/>interfaces/exporter.go] -.-> FACTORY
-    
-    %% Styling
-    classDef userInput fill:#e1f5fe,stroke:#01579b,stroke-width:2px
-    classDef coreLogic fill:#f3e5f5,stroke:#4a148c,stroke-width:2px
-    classDef dataSource fill:#e8f5e8,stroke:#1b5e20,stroke-width:2px
-    classDef exporter fill:#fff3e0,stroke:#e65100,stroke-width:2px
-    classDef output fill:#fce4ec,stroke:#880e4f,stroke-width:2px
-    classDef interface fill:#f1f8e9,stroke:#33691e,stroke-width:1px,stroke-dasharray: 5 5
-    classDef service fill:#e0f2f1,stroke:#00695c,stroke-width:2px
+      %% Styling - Colors that work in both light and dark GitHub themes
+    classDef userInput fill:#dbeafe,stroke:#1e40af,stroke-width:2px,color:#1e40af
+    classDef coreLogic fill:#ede9fe,stroke:#6d28d9,stroke-width:2px,color:#6d28d9
+    classDef dataSource fill:#d1fae5,stroke:#059669,stroke-width:2px,color:#059669
+    classDef exporter fill:#fed7aa,stroke:#ea580c,stroke-width:2px,color:#ea580c
+    classDef output fill:#fce7f3,stroke:#be185d,stroke-width:2px,color:#be185d
+    classDef interface fill:#ecfdf5,stroke:#16a34a,stroke-width:1px,stroke-dasharray: 5 5,color:#16a34a
+    classDef service fill:#cffafe,stroke:#0891b2,stroke-width:2px,color:#0891b2
     
     class CLI userInput
     class APP,FACTORY coreLogic

internal/version/version.go

@@ -5,7 +5,7 @@ package version
 // Version information.
 var (
 	// Version is the current version of the application.
-	Version = "0.2.0"
+	Version = "0.3.0"
 
 	// BuildTime is the time the binary was built.
 	BuildTime = "unknown"