docs enhanced features summary page

 - added navigation menu
 - changed markdown images to <img /> tag to add title

docs/features-summary.mdx

@@ -8,6 +8,11 @@ keywords: [c++ orm, tinyorm, features, summary, features summary]
 
 # Features Summary
 
+- [Summary List](#summary-list)
+- [Showcase Images](#showcase-images)
+
+## Summary List
+
 The following list fastly summarizes all `TinyORM` features.
 
 - simple database connections management 🧬
@@ -49,16 +54,28 @@ The following list fastly summarizes all `TinyORM` features.
 - extensive documentation 📃
 - ...
 
-### Showcase Images
+## Showcase Images
 
 ###### Tom console application
-![Tom console application](./database/assets/img/migrations/tom_cli.png)
+
+<img src={require('./database/assets/img/migrations/tom_cli.png').default}
+    alt='TinyORM - Tom console application - Showcase'
+    title='Tom console application' />
 
 ###### Passed all unit tests 🥳
-![Passed all unit tests](./assets/img/features-summary/tinyorm-passed_all_unit_tests.png)
+
+<img src={require('./assets/img/features-summary/tinyorm-passed_all_unit_tests.png').default}
+    alt='TinyORM - Passed all unit tests - Showcase'
+    title='Passed all unit tests' />
 
 ###### TinyOrmPlayground single-threaded
-![Invoked TinyOrmPlayground single-threaded](./assets/img/features-summary/tinyormplayground-single-threaded.png)
+
+<img src={require('./assets/img/features-summary/tinyormplayground-single-threaded.png').default}
+    alt='TinyORM - Invoked TinyOrmPlayground single-threaded - Showcase'
+    title='Invoked TinyOrmPlayground single-threaded' />
 
 ###### TinyOrmPlayground multi-threaded
-![Invoked TinyOrmPlayground multi-threaded](./assets/img/features-summary/tinyormplayground-multi-threaded.png)
+
+<img src={require('./assets/img/features-summary/tinyormplayground-multi-threaded.png').default}
+    alt='TinyORM - Invoked TinyOrmPlayground multi-threaded - Showcase'
+    title='Invoked TinyOrmPlayground multi-threaded' />