Improve web (#3)

* Improve web example app

* Improve readme

* Minor improvements

* add github workflow for example app

* Fix flutter version in github action

* Fix flutter version in github action

* Fix flutter version in github action

* Fix flutter version in github action

* Minor fix

* Minor fixes

* Update readme and version

* Update Changelog

* Improve wording

* Update CHANGELOG.md

Co-authored-by: Foti Dim <foti@navideck.com>

---------

Co-authored-by: Foti Dim <fdimanidis@gmail.com>
Co-authored-by: Foti Dim <foti@navideck.com>

pubspec.yaml

@@ -1,9 +1,10 @@
 name: universal_ble
 description: A cross-platform (Android/iOS/macOS/Windows/Linux/Web) Bluetooth Low Energy (BLE) plugin for Flutter
-version: 0.8.3
+version: 0.8.4
 homepage: https://navideck.com
 repository: https://github.com/Navideck/universal_ble
 issue_tracker: https://github.com/Navideck/universal_ble/issues
+
 platforms:
   android:
   ios:
@@ -11,7 +12,7 @@ platforms:
   macos:
   web:
   windows:
-
+  
 environment:
   sdk: ">=3.1.3 <4.0.0"
   flutter: ">=3.3.0"
@@ -30,6 +31,7 @@ dev_dependencies:
     sdk: flutter
   flutter_lints: ^2.0.0
   pigeon: ^13.0.0
+
 flutter:
   plugin:
     platforms:
@@ -44,3 +46,5 @@ flutter:
         sharedDarwinSource: true
       windows:
         pluginClass: UniversalBlePluginCApi
+
+