refactor(core): remove organization feature from CE console

[pinglin]

Because

• Organization feature is Enterprise Edition (EE) only and should not be part of the Community Edition (CE) console codebase
• Having organization-related code in CE creates unnecessary complexity and potential confusion
• Need to cleanly separate CE and EE feature sets

This commit

• Removes MembershipClient and OrganizationClient from SDK core exports
• Deletes all organization-related SDK types and client implementations:
  • packages/sdk/src/core/membership/ (4 files)
  • packages/sdk/src/core/organization/ (3 files)
• Removes all organization React Query hooks from toolkit:
  • useOrganization, useOrganizations, useOrganizationMemberships
  • useUserMemberships, useUserMembership
  • useCreateOrganization, useUpdateOrganization, useDeleteOrganization
  • useOrganizationMembership, useUpdateOrganizationMembership, useDeleteOrganizationMembership
  • useInviteOrganizationMembers, useOrganizationSubscription
  • useUpdateUserMembership, useDeleteUserMembership
• Updates Owner type to be UserOwner only (removes OrganizationOwner union)
• Simplifies useUserNamespaces hook to only return user namespace
• Updates UI components to remove organization-related functionality:
  • UserProfileCard - removes organization memberships display
  • SelectOrganization - returns null (placeholder for EE)
  • UserProfileBio - removes userMemberships prop
  • Pipeline share dialogs - removes organization context
  • SubscribeCTA - removes organization subscription logic
• Updates pipeline owner extraction to use user directly (no org fallback)
• Removes organization entries from sitemap generation

[github-actions]

📦 Next.js Bundle Analysis for instillai-console

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This PR introduced no changes to the JavaScript bundle! 🙌

[github-actions]

📦 Next.js Bundle Analysis for instillai-console

This analysis was generated by the Next.js Bundle Analysis action. 🤖

This PR introduced no changes to the JavaScript bundle! 🙌