Dropdown menu tests

[kamaroly]

Changelist:

1. Added icon so that I can test components with icons
2. Added dropdown menu

Summary by Sourcery

This pull request introduces a new dropdown menu component and an icon component for rendering Heroicons. It also includes tests to ensure the correct rendering of the dropdown menu and its contents.

• New Features:
  • Introduced a new dropdown menu component with trigger and content rendering capabilities.
  • Added a new icon component to render Heroicons with customizable styles and sizes.
• Tests:
  • Added comprehensive tests for the dropdown menu component, including trigger and content rendering.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request introduces tests for the dropdown menu component and adds a new icon component to support these tests. The SaladUI.DropdownMenuTest module includes tests for rendering the dropdown menu trigger, content, and the entire dropdown menu. The SaladUI.Icon module provides a component for rendering Heroicons, with documentation and usage examples.

File-Level Changes

Files	Changes
test/salad_ui/dropdown_menu_test.exs lib/salad_ui/icon.ex	Introduced new tests for the dropdown menu and added an icon component to support these tests.

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