Remove or update outdated invitation event

[vxgmichel]

This Invitation event is unused and outdated. It should be removed or updated in API v5:

parsec-cloud/libparsec/crates/protocol/schema/authenticated_cmds/events_listen.json5

Lines 53 to 65 in 02313cd

	"name": "Invitation",
	"discriminant_value": "INVITATION",
	"fields": [
	{
	"name": "token",
	"type": "InvitationToken"
	},
	{
	"name": "invitation_status",
	"type": "InvitationStatus"
	}
	]
	},

This also includes removing the claimers_ready attribute from the BaseInviteComponent which is also unused

parsec-cloud/server/parsec/components/invite.py

Line 574 in 02313cd

self._claimers_ready: dict[OrganizationID, set[InvitationToken]] = defaultdict(set)

The invitation status structure might also need to be updated since the READY variant is not used anymore:

parsec-cloud/libparsec/crates/types/src/invite.rs

Lines 69 to 74 in 02313cd

	pub enum InvitationStatus {
	Idle,
	Ready,
	Finished,
	Cancelled,
	}