feat(gui): introduce dashboard tab for computing units

[phanjc1]

Purpose

This PR makes computing units directly accessible and manageable from the Dashboard. The new tab eliminates the need to navigate through workflows and instead provides a centralized location for managing computing units directly. Through this tab, users can:

• Access a complete overview of all their computing units in a structured dashboard view.
• Create new computing units from within the dashboard.
• Rename and delete existing computing units.
• Open detailed views of individual computing units for monitoring and inspection.

Changes

• Added a new Computing Unit tab entry in the dashboard navigation.
• Implemented UserComputingUnitComponent to display the list of computing units belonging to the current user.
• Added ComputingUnitListItemComponent for individual card display, styled consistently with workflows and datasets.
• Added a new computing-unit.util.ts utility file to provide shared helper functions for computing unit–related logic.

Demonstration

Creating a New Computing Unit:

New.Unit.mp4

Deleting a Computing Unit:

Terminated.Unit.mp4

Viewing Computing Unit Details:

Details.mp4

Closes #3690

[chenlica]

Please let us know when the PR is ready. Meanwhile, two quick comments:

1. Please embed demo videos in the PR without adding those links;
2. Currently the PR modified 18 files. See if you can divide it into smaller PRs.

[phanjc1]

Please let us know when the PR is ready. Meanwhile, two quick comments:

1. Please embed demo videos in the PR without adding those links;

2. Currently the PR modified 18 files.  See if you can divide it into smaller PRs.

I’ve resolved the link issue with the demo videos; they are now embedded in the PR.

[aicam]

Please let us know when the PR is ready. Meanwhile, two quick comments:

1. Please embed demo videos in the PR without adding those links;
2. Currently the PR modified 18 files. See if you can divide it into smaller PRs.

I am working on dividing