vue_module/templates.xml

<openerp>
    <data>
        <template id="vue_module" name="Vue Module" inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
                <script type="text/javascript" src="/vue_module/static/src/main.js" />
            </xpath>
        </template>

        <record id="vue_module_action" model="ir.actions.client">
            <field name="name">Vue Module</field>
            <field name="tag">vue_module.vue_module_action</field>
        </record>

        <menuitem id="vue_module_menu" name="Vue Module" sequence="0"/>
        <menuitem id="vue_module_menu_main" name="Principal" parent="vue_module_menu" />
        <menuitem id="vue_module_module" name="App" parent="vue_module_menu_main" action="vue_module_action" />
    </data>
</openerp>