feat: add search button action to table component

[urufudev]

Description

This PR adds a search button to the table component that allows users to manually trigger the search action. Currently, the table search relies solely on live/debounced input. This button provides an alternative interaction pattern for users who prefer explicit search submission or when live search is disabled.

The button is rendered next to the search input and respects the existing searchable() configuration. It uses the default Filament button styling to maintain visual consistency.

Visual changes

No visual breaking changes. The button appears inline with the existing search input using standard Filament UI components.

Default usage

	Light theme	Dark theme
->searchOnAction()

Without icon

	Light theme	Dark theme
->searchOnAction(icon: false)

Without label

	Light theme	Dark theme
->searchOnAction(label: false)

Functional changes

• Code style has been fixed by running the composer cs command.
• Changes have been tested to not break existing functionality.
• Documentation is up-to-date.