feat(fusion_clock): native shift roles (fusion.clock.role) [A1-A3]

Replaces Odoo Planning's planning.role: name+colour model with the same
1-11 palette, employee default/allowed role fields, Employee Roles editor,
role_id on shift template + schedule with default resolution, ACLs, menus.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_clock/views/clock_shift_views.xml

@@ -36,6 +36,7 @@
                             <field name="sequence"/>
                             <field name="active"/>
                             <field name="color" widget="color"/>
+                            <field name="role_id" options="{'no_quick_create': True}"/>
                             <field name="company_id" groups="base.group_multi_company"/>
                         </group>
                     </group>