update documentation structure by adding sidebar positions and renaming sections for clarity

Author: cremarco

docs/plug-in/index.mdx

@@ -1,4 +1,8 @@
-# Plugin
+---
+sidebar_position: 4
+---
+
+# Plugins
 
 MantisTable UI is designed to be an extensible tool, as it allows users to enhance its capabilities through the use of plugins.
 There are three main types of plugins that can be integrated:

docs/roadmap.md

@@ -0,0 +1,21 @@
+---
+sidebar_position: 7
+---
+
+# Roadmap
+
+This page outlines the upcoming developments and planned features for MantisTable UI. We're committed to continuously improving the platform to better serve the Semantic Table Interpretation community.
+
+## Current Development Status
+
+For the most up-to-date information about ongoing development, planned features, and known issues, please refer to our [GitHub Issues page](https://github.com/unimib-datAI/mantistable-ui/issues).
+
+The Issues page contains:
+- **Feature Requests**: New functionality proposals and enhancements
+- **Bug Reports**: Known issues and their resolution status
+- **Development Milestones**: Planned releases and their progress
+- **Community Discussions**: User feedback and suggestions
+
+---
+
+*This roadmap is a living document and may be updated based on community feedback and development priorities.*

docs/sample.md

@@ -1,9 +1,10 @@
 ---
 id: sample
-title: Sample
+title: Samples
+sidebar_position: 5
 ---
 
-# Sample Input and Output
+# Samples Input and Output
 
 This section provides example files showing **how to structure input tables** and the corresponding **generated outputs** in different formats.  
 The documentation includes examples for two CSV tables: **mountains** and **movies**.  

docs/troubleshooting.md

@@ -1,3 +1,7 @@
+---
+sidebar_position: 6
+---
+
 # Troubleshooting
 
 This section lists common issues that may occur when using **MantisTableUI** and provides possible solutions.