fix(native): Enable window draging by the title bar

[piotrski]

Description

Adds data-tauri-drag-region to the title bar, which is needed to perform window dragging in the native application.
This change is needed to resolve elk-zone/elk-native#10

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Translations update
• Other

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• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
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• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).

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