Move members into Organization settings tab

[gearnode]

Summary

Removes the standalone People sidebar entry and consolidates membership management under Organization → Members.

• Sidebar: "Settings" is renamed to Organization; the People item is removed.
• Members tab: New tab at /organizations/:id/settings/members showing email, role, and actions (send activation mail, archive, remove) — same behavior as the old People list, without name/status/created columns or person detail pages.
• Add member: Simplified dialog with email + role only.
• Redirects: Old /people URLs redirect to /settings/members.

Test plan

• Open Organization in sidebar — Members tab is visible and loads the member list
• Verify email, role select, and action dropdown (invite/archive/remove) work as before
• Add a member via the dialog
• Confirm General, SAML SSO, SCIM, Webhooks, and Audit Log tabs still work for org admins
• Visit old /people URL — should redirect to /settings/members
• Task assignee names display without linking to removed person pages

  

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Summary by cubic

Moved membership management into Organization → Members and removed the standalone People section. Keeps invite/archive/remove, simplifies adding members, and redirects old People routes to the new Members tab.

App: console +351 -701

• Sidebar: renamed “Settings” to “Organization”; removed “People”; show “Organization” if user can update org or list members.
• Settings: added permission-gated tabs with a new Members tab as default; header now says “Organization”; introduced query loader.
• Members: new settings page with an email-first table, role column, and action menu (invite/resend, archive, remove); rows are no longer links; default sort by email.
• Add member: new dialog and form with email + role only; auto-derives name from email; appends to list via connection.
• Removal: deleted person detail pages and People routes; added redirects from /people to /settings/members.
• Tasks: assignee names display as plain text (link removed).

^{Written for commit 395f7eb. Summary will update on new commits.}