Replace API deferred queue with efficient message batching system (#9012)

esphome/components/api/__init__.py

@@ -49,6 +49,7 @@ SERVICE_ARG_NATIVE_TYPES = {
     "string[]": cg.std_vector.template(cg.std_string),
 }
 CONF_ENCRYPTION = "encryption"
+CONF_BATCH_DELAY = "batch_delay"
 
 
 def validate_encryption_key(value):
@@ -109,6 +110,9 @@ CONFIG_SCHEMA = cv.All(
             ): ACTIONS_SCHEMA,
             cv.Exclusive(CONF_ACTIONS, group_of_exclusion=CONF_ACTIONS): ACTIONS_SCHEMA,
             cv.Optional(CONF_ENCRYPTION): _encryption_schema,
+            cv.Optional(
+                CONF_BATCH_DELAY, default="100ms"
+            ): cv.positive_time_period_milliseconds,
             cv.Optional(CONF_ON_CLIENT_CONNECTED): automation.validate_automation(
                 single=True
             ),
@@ -129,6 +133,7 @@ async def to_code(config):
     cg.add(var.set_port(config[CONF_PORT]))
     cg.add(var.set_password(config[CONF_PASSWORD]))
     cg.add(var.set_reboot_timeout(config[CONF_REBOOT_TIMEOUT]))
+    cg.add(var.set_batch_delay(config[CONF_BATCH_DELAY]))
 
     for conf in config.get(CONF_ACTIONS, []):
         template_args = []