Subscription Details: Table and Details components

What does this MR do?

This MR is part of a series that addresses gitlab-org/gitlab#273028 in creating the Subscription Details View for <strong data-sourcepos="16:116-16:132">Opt-In online</strong> customers.

Description	MR
Table and Details components	👈 you are here
User Info Component	!57852 (merged)
License History Component	tbd
Subscription-Breakdown (integrates all the previous)	tbd
Integrate GraphQL to provide data	tbd

Screenshots (strongly suggested)

This MR does not contain UI changes but here's a preview of how's gonna look like. The loading state is using a 2-lines skeleton loader.

Loading state	With content

Note: the buttons are part of the Breakdown component (4th step), their conditional loading will be handled there.

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because the feature is under Application settings and does not introduce UI chagnes.
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team