feat(fusion_planning): new module bridging fusion_clock with Odoo Planning

Adds a 'My Schedule' tab to the Fusion Clock portal that lists the current
employee's published planning.slot records, grouped by day. Reuses the
fusion_clock dark theme and reuses Odoo Planning's stock backend UI
(Gantt, send wizard, recurrence) unchanged.

- Controller /my/clock/schedule: pulls published slots in next 60 days
- Portal template with next-shift hero card, summary stats, grouped list
- Bottom-nav xpath inherits target the nav bar specifically (not the
  Recent Activity 'View All' link, which also linked to /my/clock/timesheets)
- 4-tab nav fits via reduced padding and flex sizing

Module depends on stock 'planning' (Enterprise) + fusion_clock.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_planning/controllers/__init__.py

@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+from . import portal_schedule