fix: style IMP Widget UI similar to sec reader

[flxapps]

fixes https://github.com/merckgroup/mtrust-docs/issues/246

[Copilot]

Pull Request Overview

This PR updates the IMP Widget UI to align with the styling used in the security reader. The changes focus on making the UI more consistent across the codebase by updating button styles, spacing, and layout components.

• Replace standard buttons with LdButtonVague components with consistent styling
• Update text components to use muted styling where appropriate
• Modernize Android Gradle configuration files across example projects

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

File	Description
lib/src/ui/imp_widget.dart	Updated UI components to use consistent button styling, muted text, and improved layout
lib/src/imp_reader.dart	Minor code formatting improvements for line length consistency
example//android/	Modernized Android Gradle configuration files and updated dependencies

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[ElectricCookie]

Very nice, please only adjust the wording around the remaining readings left per token, to the message "Internet connection ... " as the end user does not know what tokens are.