FLUT-1020062: Enhanced Flutter Licensing UG documentation

[Harsha-SF4223]

Description

Enhanced the Flutter User Guide documentation for the Licensing section, covering the Syncfusion Flutter licensing model, license key registration, and license-vs-unlock-key clarification.

Files Updated

https://help.syncfusion.com/flutter/licensing/overview

Changes Made

Added

• Added a complete, runnable code example with imports and a MyApp class for SyncfusionLicense.registerLicense(...).
• Added pubspec.yaml dependency example for syncfusion_flutter_core.
• Added link to the license key generation help page.
• Added a step-by-step numbered list (4 steps) to walk through license registration.
• Added explanation: "pub.dev package-based licensing".
• Added note: "Applies to both trial and licensed usage".
• Added note: "License key is platform/version-specific".
• Added a new section: "License key vs. Unlock key".
• Added a "See Also" section with 3 relevant links.

Updated

• Updated frontmatter title to "Syncfusion Licensing Overview" (removed "unlock keys" mention).
• Updated frontmatter description to focus on the licensing model introduced in 18.3.0.x.
• Improved clarity, grammar, and terminology throughout the page.
• Renamed the section to introduce the concept before the steps.
• Clarified terminology: "License key" vs. "Unlock key" usage scenarios.
• Improved code example to be copy-paste ready and self-contained.

Removed

• Removed incorrect return keyword from the runApp() call.
• Removed redundant "Flutter" repetition in the page intro.
• Removed the awkward phrase "follow the following".
• Removed the informal "example" wording (replaced with "application").

Fixed

• Fixed code: return runApp(MyApp()) → runApp(const MyApp()).
• Fixed curly quotes to straight quotes in Dart imports.
• Fixed double quotes to single quotes inside Dart code blocks.
• Fixed {% highlight Dart %} → {% highlight dart %} (lowercase language tag).
• Fixed capitalization: "The License key" → "License key".
• Added missing periods in 3 locations.
• Fixed grammar: "follow the following" → "follow these steps".

Why This Change?

• Reflect the new pub.dev package-based licensing model introduced in 18.3.0.x.
• Eliminate the confusion between license keys and unlock keys.
• Provide a copy-paste-ready code example so developers can register the license with one step.
• Align terminology and capitalization with Syncfusion documentation standards.
• Improve developer onboarding and reduce support incidents related to licensing errors.

Validation

• Verified documentation flow
• Verified all links are active
• Verified the code sample compiles and runs (SyncfusionLicense.registerLicense is called before runApp)
• Verified pubspec.yaml snippet matches current package name
• Reviewed grammar, capitalization, and punctuation
• Checked for errors after edits

Impact

• No API changes.
• No functional changes.
• Documentation enhancement only.

Documentation Enhancement Metrics

Category	Count
Missing Steps Added	4
Missing Information Added	6
Technical Corrections	3
Code Quality Fixes	1
Grammar Improvements	6
Files Modified	1

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: FLUT-1020062-enhance-licensing-hotfix

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: FLUT-1020062-enhance-licensing-hotfix
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