feat: Add company billing page with subscription state overview

[Rockyy174]

No description provided.

[sourcery-ai]

Hey - I've left some high level feedback:

• In BillingStatusBadge, the className lookup assumes the BillingStatus union will never grow; consider adding a default/fallback style so new or unexpected statuses don’t render with missing styling.
• The Current plan section shows the billing interval both under the plan heading and again in the detail rows; you may want to remove one of these to avoid redundant information.
• A new paths.test.ts file is introduced but has no contents in this diff; if it’s not needed yet, consider removing it or populating it to avoid having a dead/placeholder test file in the tree.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In `BillingStatusBadge`, the `className` lookup assumes the `BillingStatus` union will never grow; consider adding a default/fallback style so new or unexpected statuses don’t render with missing styling.
- The `Current plan` section shows the billing interval both under the plan heading and again in the detail rows; you may want to remove one of these to avoid redundant information.
- A new `paths.test.ts` file is introduced but has no contents in this diff; if it’s not needed yet, consider removing it or populating it to avoid having a dead/placeholder test file in the tree.

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