[CAL-2888] New Org migration path

[PeerRich]

previously we required org members to create a new account. We are now making it work to upgrade an existing team to an organisation (subdomain.cal.com) without breaking previous links and redirecting back.

this needs a migration path triggered by the team owner:

• team owner sees a banner with more than 2 teams: "You have a lot of teams. Consider making an organisation to get a subdomain, unify links, billing and analytics"
• if OrgPlan: <Button>Get Started</Button>
• if NotOrgPlan: <Button>Contact Sales</Butto

old.	new
cal.com/team/acme-sales	acme.cal.com/sales

• we can pre-fill these inputs with a simple regex to remove "acme-" or "-acme" if subdomain = acme
• we should mention that even tho links change, they will continue to work with a redirect
• after clicking: "Done", every member gets an email:

Hey Peer.

Anna invited you to the Acme organisation. Your link has been changed from cal.com/peer-richelsen-acme to acme.cal.com/peer but dont worry, all previous links still work and redirect appropriately.

Dan has upgraded the previous cal.com account to unify usernames under one subdomain. Every team member link is now according to their email at Acme:

peer@acme.com → acme.cal.com/peer

Please note: All of your personal event types have been moved into the Acme organisation, which may also include potential personal link.

Please log in and make sure you have no private events on your new organisational account.

For personal events we recommend creating a new cal.com account with a personal email address.

Enjoy your new clean link: acme.cal.com/peer

Yours,

Team Cal.com

_{From SyncLinear.com | CAL-2888}