Update documentation and refactor code to replace OllamaAPI with Ollama

- Replaced all instances of `OllamaAPI` with `Ollama` in documentation and code examples for consistency.
- Enhanced the configuration for handling broken markdown links in Docusaurus.
- Updated integration tests and example code snippets to reflect the new class structure.

docs/docusaurus.config.js

@@ -24,7 +24,6 @@ const config = {
     projectName: 'ollama4j', // Usually your repo name.
 
     onBrokenLinks: 'throw',
-    onBrokenMarkdownLinks: 'warn',
 
     // Even if you don't use internationalization, you can use this field to set
     // useful metadata like html lang. For example, if your site is Chinese, you
@@ -175,6 +174,9 @@ const config = {
         }),
     markdown: {
         mermaid: true,
+        hooks: {
+            onBrokenMarkdownLinks: 'warn'
+        }
     },
     themes: ['@docusaurus/theme-mermaid']
 };