Family invites (#1397)

* Initial pass at household invites

* Invitee setup

* Clean up add member form

* Lint and other tweaks

* Security cleanup

* Lint

* i18n fixes

* More i18n cleanup

* Show pending invites

* Don't use turbo on the form

* Improved email design

* Basic tests

* Lint

* Update onboardings_controller.rb

* Registration + invite cleanup

* Lint

* Update brakeman.ignore

* Update brakeman.ignore

* Self host invite links

* Test tweaks

* Address missing param error

db/migrate/20241030222235_create_invitations.rb

@@ -0,0 +1,18 @@
+class CreateInvitations < ActiveRecord::Migration[7.2]
+  def change
+    create_table :invitations, id: :uuid do |t|
+      t.string :email
+      t.string :role
+      t.string :token
+      t.references :family, null: false, foreign_key: true, type: :uuid
+      t.references :inviter, null: false, foreign_key: { to_table: :users }, type: :uuid
+      t.datetime :accepted_at
+      t.datetime :expires_at
+
+      t.timestamps
+    end
+
+    add_index :invitations, :token, unique: true
+    add_index :invitations, :email
+  end
+end