feat: Integrate Docusaurus for documentation and enhance project structure

- Added Docusaurus configuration and initial setup for documentation.
- Created multiple documentation pages covering installation, configuration, and core concepts.
- Implemented a GitHub Actions workflow for automatic deployment of documentation to GitHub Pages.
- Updated .gitignore to exclude Docusaurus build artifacts and dependencies.
- Enhanced README with a link to the online documentation.

.gitignore

@@ -70,4 +70,15 @@ backups/
 static/dist/
 
 # Ignore binaries
-gomft
+gomft
+
+# Docusaurus files
+docs/.docusaurus/
+docs/.cache-loader/
+docs/build/
+docs/build-searchindex/
+docs/static/search/
+docs/static/js/
+docs/node_modules/
+docs/.env*
+docs/*.log