Add 24 missing English translation keys

[Gabriel Dufresne (GabrielDuf)]

This pull request adds several new English UI strings to the lang_en.json localization file. These additions support new features and messaging related to package installation, security, file selection, and error handling.

New UI strings for enhanced features and error handling:

• Added strings for package installation steps and operations, such as "Pre-install", "Post-install", "Arguments", and "before installing".
• Introduced security-related messages informing users about pre/post-operation script settings.
• Added file selection and browsing prompts, including "Browse...", "Select executable", and related guidance.
• Included new error and status messages for update package issues and elevation tool requirements.
• Added strings for displaying package metadata, such as "Architecture", "Package Manager", "Last updated", and "Dependencies".