Fix Save button not enabling while editing exploration name or description

[Ahamed1846]

Fixes #4723

This PR fixes a UX issue in the Exploration inspector where the Save button appeared disabled while editing the exploration name or description. Although changes were being made, the Save button only became enabled after the input lost focus, which was confusing and made it seem like edits were not being detected.

Technical details

Problem

The Save button relies on a hasChanges flag to reflect unsaved edits.

Previously:

• hasChanges was updated only on the change event
• change fires only after the input loses focus
• While typing, the Save button remained visually disabled

This caused a mismatch between user actions and UI feedback.

Fix

• Updated the name and description inputs to mark the form as changed on the input event
• Preserved existing change handlers to avoid altering save behavior

This ensures the Save button reflects unsaved changes immediately while typing.

Behavior changes

• Save button enables as soon as the user starts typing
• Visual state now accurately reflects pending edits
• No changes to save logic or backend behavior

Files touched

• mathesar_ui/src/systems/data-explorer/exploration-inspector/ExplorationTab.svelte

---

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the develop branch of the repository
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I tried running the project locally and verified that there are no
  visible errors.

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[pavish]

The name and description update should happen after a debounced interval when the user is typing and it should immediately happen when the input loses focus. Please use the Debounce component from our component library to do this.

[Ahamed1846]

Updated the name and description inputs to use the Debounce component, with debounced updates during typing and immediate updates on blur.