bugfix: Webview js fix mobile devices

[gopalparashar421]

Description

JavaScript was not working earlier on Webview component on Mobile devices because the default JavaScript mode was set to restricted. Explicitly enabled JavaScript support by setting the mode to unrestricted
Fixes: #114 #5200

Test Code

# Can be tested by running your existing Webview app or example from Docs on Android/iOS. Test code could not be provided since it'll require an HTML for testing.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I signed the CLA.
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass locally with my changes
• I have made corresponding changes to the documentation (if applicable)

Additional details

I have tested this on one of my personal applications where I created an HTML file with React JS to check state management and hooks.

Summary by Sourcery

Enable full JavaScript support for the WebView component on mobile platforms and bump the WebView package version.

Bug Fixes:

• Ensure WebView JavaScript executes correctly on mobile devices by setting the JavaScript mode to unrestricted.

Build:

• Bump the flet_webview Flutter package version from 0.1.0 to 0.2.0.

Documentation:

• Document the WebView JavaScript enablement fix in the main and package-specific changelogs.

[sourcery-ai]

We've reviewed this pull request using the Sourcery rules engine

[ndonkoHenri]

We have an async method for that: https://docs.flet.dev/webview/#flet_webview.WebView.set_javascript_mode ?

[FeodorFitsner]

Yep, closing.