partner-contact/base_continent/views/continent.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record id="view_continent_tree" model="ir.ui.view">
        <field name="name">res.continent.tree</field>
        <field name="model">res.continent</field>
        <field name="arch" type="xml">
            <tree string="Continents">
                <field name="name" />
                <field name="code" />
            </tree>
        </field>
    </record>

    <record id="view_continent_form" model="ir.ui.view">
        <field name="name">res.continent.form</field>
        <field name="model">res.continent</field>
        <field name="arch" type="xml">
            <form string="Continent">
                <group name="main">
                    <field name="name" />
                    <field name="code" />
                </group>
                <group name="countries" string="Countries">
                    <field name="country_ids" nolabel="1" readonly="1"/>
                </group>
            </form>
        </field>
    </record>

    <record id="action_continent" model="ir.actions.act_window">
        <field name="name">Continents</field>
        <field name="res_model">res.continent</field>
        <field name="view_mode">tree,form</field>
        <field name="help">Display and manage the list of all continents that can be assigned to your partner records.</field>
    </record>

    <menuitem id="menu_continent_partner"
        action="action_continent"
        parent="sales_team.menu_localisation"
        sequence="1" groups="base.group_no_one"/>

</odoo>