feat: Team APIs (#1654)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/models/team.rb

@@ -0,0 +1,25 @@
+# == Schema Information
+#
+# Table name: teams
+#
+#  id                :bigint           not null, primary key
+#  allow_auto_assign :boolean          default(TRUE)
+#  description       :text
+#  name              :string           not null
+#  created_at        :datetime         not null
+#  updated_at        :datetime         not null
+#  account_id        :bigint           not null
+#
+# Indexes
+#
+#  index_teams_on_account_id  (account_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (account_id => accounts.id)
+#
+class Team < ApplicationRecord
+  belongs_to :account
+  has_many :team_members, dependent: :destroy
+  has_many :conversations, dependent: :nullify
+end