[ewk_webview_flutter] Introduce ewk_webview_flutter_tizen

* This is almost same as the webview_flutter_tizen except for backend web engine.

Signed-off-by: MuHong Byun <mh.byun@samsung.com>

packages/ewk_webview_flutter/.gitignore

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+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+build/

packages/ewk_webview_flutter/CHANGELOG.md

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+## 0.1.0
+
+* Initial release.

packages/ewk_webview_flutter/LICENSE

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+Copyright (c) 2021 Samsung Electronics Co., Ltd. All rights reserved.
+Copyright (c) 2017 The Chromium Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the names of the copyright holders nor the names of the
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

packages/ewk_webview_flutter/README.md

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+# ewk_webview_flutter_tizen
+
+[![pub package](https://img.shields.io/pub/v/ewk_webview_flutter_tizen.svg)](https://pub.dev/packages/ewk_webview_flutter_tizen)
+
+The Tizen implementation of [`webview_flutter`](https://github.com/flutter/plugins/tree/master/packages/webview_flutter).
+
+## Supported devices
+
+This plugin is only supported on TV devices running Tizen 5.5 or later.
+
+## Required privileges
+
+To use this plugin, add below lines under the `<manifest>` section in your `tizen-manifest.xml` file,
+
+```xml
+<privileges>
+  <privilege>http://tizen.org/privilege/internet</privilege>
+</privileges>
+```
+
+## Usage
+
+This package is not an _endorsed_ implementation of `webview_flutter`. Therefore, you have to include `ewk_webview_flutter_tizen` alongside `webview_flutter` as dependencies in your `pubspec.yaml` file.
+
+```yaml
+dependencies:
+  webview_flutter: ^3.0.4
+  ewk_webview_flutter_tizen: ^0.5.0
+```
+
+## Example
+
+```dart
+import 'dart:io';
+import 'package:webview_flutter/webview_flutter.dart';
+
+class WebViewExample extends StatefulWidget {
+  @override
+  WebViewExampleState createState() => WebViewExampleState();
+}
+
+class WebViewExampleState extends State<WebViewExample> {
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return WebView(
+      initialUrl: 'https://flutter.dev',
+    );
+  }
+}
+```
+
+## Limitations
+
+- This is an initial webview plugin for Tizen and is implemented based on Tizen Lightweight Web Engine (LWE). If you would like to know detailed specifications that the LWE supports, please refer to the following link :
+https://review.tizen.org/gerrit/gitweb?p=platform/upstream/lightweight-web-engine.git;a=blob;f=docs/Spec.md;h=ecb8f437c5a1facc77d3435e1a8aad6a267f12f3;hb=refs/heads/tizen

packages/ewk_webview_flutter/example/.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json

packages/ewk_webview_flutter/example/README.md

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+# ewk_webview_flutter_tizen_example
+
+Demonstrates how to use the ewk_webview_flutter_tizen plugin.
+
+## Getting Started
+
+To run this app on your Tizen device, use [flutter-tizen](https://github.com/flutter-tizen/flutter-tizen).

packages/ewk_webview_flutter/example/assets/www/index.html

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+<!DOCTYPE html>
+<!-- Copyright 2013 The Flutter Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file. -->
+<html lang="en">
+<head>
+<title>Load file or HTML string example</title>
+<link rel="stylesheet" href="styles/style.css" />
+</head>
+<body>
+
+<h1>Local demo page</h1>
+<p>
+  This is an example page used to demonstrate how to load a local file or HTML 
+  string using the <a href="https://pub.dev/packages/webview_flutter">Flutter 
+  webview</a> plugin.
+</p>
+
+</body>
+</html>

packages/ewk_webview_flutter/example/assets/www/styles/style.css

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+h1 {
+    color: blue;
+}