feat(ui): add select all button to category headers

[kaic]

Description

Implemented a "Select All" / "Deselect All" button within each category header.

Type of Change

• feat: New feature (software, configuration, or functionality)
• fix: Bug fix
• docs: Documentation update
• refactor: Code refactoring (no functional changes)
• chore: Maintenance (dependencies, configs, etc.)
• test: Adding or updating tests

Related Issue

Closes #29

Changes Made

• Added a checkbox button to the right side of the category section header.
• The button lets users toggle selection for all items in that category at once.
• The button height and style match the existing category expand button for a consistent UI.

Screenshots

Checklist

• I have tested my changes locally
• My code follows the project's code style
• I have used conventional commit format for my commit messages
• My changes do not break the build (npm run build)
• My changes pass linting (npm run lint)
• I have updated documentation if necessary

For Catalog Changes (Software/Configurations)

• I have verified the winget ID is correct (for software)
• I have tested the configuration on Windows 10/11 (for configs)
• I have added appropriate icons
• I have placed the item in the correct category

Labels