[ADD] event_speaker: add speakers to event

event_speaker/models/__init__.py

@@ -0,0 +1 @@
+from . import event_event

event_speaker/models/event_event.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from odoo import fields, models
+
+
+class EventEvent(models.Model):
+    _inherit = "event.event"
+
+    speakers = fields.Many2many(
+        'res.partner', string="Speakers"
+    )