release: v1.1.0 — pub.dev polish, docs, tests, visual rendering

## Documentation
- Translate all Vietnamese comments to English (hyper_viewer.dart, adapter.dart)
- Add dartdoc to HyperRenderMode enum and HtmlAdapter class
- Rewrite README: absolute image URLs for pub.dev, screenshots field,
  better conversion structure (Quick Start first, then features)
- Update pub description to include flutter_html discovery keywords
- Fix sub-package README version references (^1.0.0 → ^1.1.0)

## pub.dev readiness
- Bump all sub-package versions to 1.1.0 (html, markdown, highlight,
  clipboard, devtools)
- Add screenshots: field to pubspec.yaml with 6 demo GIFs
- Update vector_math: ^2.1.4 → ^2.2.0
- Fix pubspec_publish_ready.yaml (versions, description, screenshots)
- Update prepare_publish.sh: auto-remove publish_to: none,
  validate all required files and screenshot assets
- Fix pubspec comments: ^1.2.0 → ^1.1.0

## Tests
- Replace 3 TODO stub tests with real assertions (DeltaAdapter,
  MarkdownAdapter, HyperViewer.delta/markdown constructors)
- Add URL assertion to link tap tests in render_hyper_box_test and
  layout_logic_test
- Add virtualized mode + auto-large-content integration tests
  using tester.runAsync() for async parse path
- Update golden images to match current rendering output

## Demo
- Add CJK languages demo (cjk_languages_demo.dart)
- Add devtools_options.yaml to example

Author: vietnguyentuan2019

README.md

@@ -0,0 +1,3 @@
+description: This file stores settings for Dart & Flutter DevTools.
+documentation: https://docs.flutter.dev/tools/devtools/extensions#configure-extension-enablement-states
+extensions:

example/devtools_options.yaml

@@ -13,7 +13,7 @@
 ///   onLinkTap: (url) => print(url),
 /// )
 /// ```
-library hyper_render_example;
+library;
 
 import 'package:flutter/material.dart';
 import 'package:hyper_render/hyper_render.dart';

example/example.dart

@@ -204,7 +204,7 @@ MyWidget()        // Not as good</code></pre>
                       ),
                       Text(
                         'Enable TalkBack/VoiceOver to test accessibility',
-                        style: TextStyle(color: Colors.white70, fontSize: 12),
+                        style: TextStyle(color: Colors.white, fontSize: 12),
                       ),
                     ],
                   ),

example/lib/accessibility_demo.dart

@@ -118,7 +118,7 @@ class _BaseUrlDemoState extends State<BaseUrlDemo> {
           Text(
             'Resolve relative URLs against a base, and intercept link taps '
             'for navigation, mailto, tel, and external URLs.',
-            style: TextStyle(fontSize: 13, color: Colors.white70),
+            style: TextStyle(fontSize: 13, color: Colors.white),
           ),
         ],
       ),

example/lib/base_url_demo.dart

@@ -431,7 +431,7 @@ class CssPropertiesDemo extends StatelessWidget {
                     ),
                     Text(
                       'Comprehensive CSS support showcase',
-                      style: TextStyle(fontSize: 13, color: Colors.white70),
+                      style: TextStyle(fontSize: 13, color: Colors.white),
                     ),
                   ],
                 ),
@@ -441,7 +441,7 @@ class CssPropertiesDemo extends StatelessWidget {
           SizedBox(height: 12),
           Text(
             '✅ text-shadow • text-overflow • border-style • direction (RTL/LTR)',
-            style: TextStyle(fontSize: 12, color: Colors.white70),
+            style: TextStyle(fontSize: 12, color: Colors.white),
           ),
         ],
       ),

example/lib/cjk_languages_demo.dart

@@ -21,26 +21,26 @@ class DemoColors {
 
   /// Accent - Content formats (Teal/Cyan family)
   /// Used for: Quill Delta, Markdown, Code Blocks, Image Handling
-  static const accent = Color(0xFF26A69A); // Teal 400
+  static const accent = Color(0xFF00695C); // Teal 800 — contrast 6.3:1 on white
 
   /// Warning - Media & Performance (Amber/Orange family)
   /// Used for: Video, Zoom, Stress Test
-  static const warning = Color(0xFFFF9800); // Orange 500
+  static const warning = Color(0xFFBF360C); // Deep Orange 900 — contrast 5.6:1 on white
 
   /// Success - Quality & Accessibility (Green family)
   /// Used for: Accessibility, Library Comparison, FWFH Tests
-  static const success = Color(0xFF66BB6A); // Green 400
+  static const success = Color(0xFF2E7D32); // Green 800 — contrast 5.0:1 on white
 
   /// Error - Security & Critical (Red family)
   /// Used for: Security Demo, Critical warnings
-  static const error = Color(0xFFEF5350); // Red 400
+  static const error = Color(0xFFC62828); // Red 900 — contrast 5.6:1 on white
 
   // ============================================
   // NEUTRAL PALETTE
   // ============================================
 
   /// Neutral for less important items
-  static const neutral = Color(0xFF78909C); // Blue Grey 400
+  static const neutral = Color(0xFF546E7A); // Blue Grey 600 — contrast 5.1:1 on white
 
   // ============================================
   // COLOR SEMANTICS