feat: Add team billing management

[magic-peach]

Issue Description

Teams need billing and subscription management.

Issue Type

• Bug
• Feature Request
• Enhancement
• Documentation
• Refactor
• Other

Description

Implement billing:

• Team subscriptions
• Usage tracking
• Invoice management
• Payment methods
• Plan upgrades

Claiming This Issue

• I'm willing to solve this issue by myself

[github-actions]

Thank you for raising this issue! 🙌

We'll review it as soon as possible. We truly appreciate your contribution! ✨

📌 Before moving ahead:

• Please make sure you've gone through README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md.
• 🚫 Do NOT create a PR until this issue has been assigned to you.

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[github-actions]

⏳ Hi @magic-peach, you already have 4 active issues assigned.

This issue is added to your queue and will be auto-assigned when one of your current issues is closed.

[github-actions]

🎉 @magic-peach, one of your issues was closed, so this queued issue is now assigned to you.

You now have 4/4 active issues.

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 16 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!

[github-actions]

⏰ Inactivity Warning

Hi @magic-peach! 👋

This issue has been inactive for 15 hours.

Please provide an update within the next 15 hours, or you may be automatically unassigned to give others a chance to contribute.

💡 If you need more time, just leave a comment to reset the timer!