Update Figma block name

[thrijith]

Description of the Change

• Renames the plugin file and name, updates text-domain.

Closes #26

How to test the Change

• Activate the plugin.
• Confirm the plugin name is updated.
• Confirm the plugin file is updated.
• Confirm the block still loads and works as expected.

Changelog Entry

Changed - Plugin Name

Credits

@jeffpaul @thrijith

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.