Enhanced the Overview page in Flutter UG

[Mugunthan-Ramalingam]

Description

Updated the Overview page of the Syncfusion Flutter User Guide documentation with comprehensive product information, platform support details, and complete controls catalog.

Ticket - [Tickets-245503] [UG] [Flutter] Revamp Syncfusion Flutter Controls Overview Page | Syncfusion Inter…
Banner - [Ticket-245952] Request for Banner Image Design – Combination of 5 Controls | User Experience
Control icons - [Ticket-245952] Request for Banner Image Design – Combination of 5 Controls | User Experience

Scope

• Content update with Flutter banner, supported platforms, and complete controls list
• Documentation enhancement with improved content organization
• UI improvement with styled control list and resource cards
• Image update with new Syncfusion Flutter banner

Changes

• Added Syncfusion Flutter banner image at the top of the page
• Added Supported Platforms table with 6 platforms and version requirements
• Added complete Flutter Controls List with 19 controls organized in 5 categories:
  • Data Visualization (8 controls)
  • Gauges & Indicators (2 controls)
  • Input Controls (3 controls)
  • Data Management (3 controls)
  • Editors & UI (3 controls)
• Added Resources section with 5 resource cards
• Added Support and Feedback section with 2 support cards

Checklist

• Content updated with complete Flutter product information
• All 19 Flutter controls added and categorized
• Supported platforms documented with version details
• Resource section with external links added
• Images added and referenced correctly
• Documentation preview verified
• No source code changes
• No API changes

Reference

Similar to syncfusion-content/maui-docs#4295
https://help.syncfusion.com/maui/introduction/overview#controls-list
https://github.com/syncfusion-content/maui-docs/blob/master/MAUI/Introduction/Overview.md?plain=1

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: FLUT-overview-page

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: FLUT-overview-page
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
Front matter Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0

[sfHariHaraSudhan]

Approved.