[MKT-448]: feat/b2b integrated checkout (logic)

[xabg2]

Handling all logic to allow the user to purchase a b2b plan:

• Redirect the user to our integrated checkout instead of the Stripe Checkout
• How many seats the user want for his b2b subscription
• Updating b2b subscription from int checkout if needed
• Optional fields to fill it with the company data (company name and tax ID)

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Name	Status	Preview	Comments	Updated (UTC)
drive-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 12, 2024 4:29pm

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Deploying drive-web with    Cloudflare Pages

Latest commit:	2a20867
Status:	⚡️  Build in progress...

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[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud