parameters: support for an optional remote parameter database (#22836)

The voxl2 has a split architecture. PX4 runs on a posix platform and a Qurt platform. The two communicate uorb topics back and forth with the muorb module. But each has it's own parameters database and they need to stay in sync with each other. This PR adds support to keep the 2 parameter databases in sync. The main parameters database running on Linux has file system support while the Qurt one does not. The Linux side is considered the primary and the Qurt side is considered the remote.

msg/CMakeLists.txt

@@ -154,6 +154,10 @@ set(msg_files
 	OrbTest.msg
 	OrbTestLarge.msg
 	OrbTestMedium.msg
+	ParameterResetRequest.msg
+	ParameterSetUsedRequest.msg
+	ParameterSetValueRequest.msg
+	ParameterSetValueResponse.msg
 	ParameterUpdate.msg
 	Ping.msg
 	PositionControllerLandingStatus.msg

msg/ParameterResetRequest.msg

@@ -0,0 +1,8 @@
+# ParameterResetRequest : Used by the primary to reset one or all parameter value(s) on the remote
+
+uint64 timestamp
+uint16 parameter_index
+
+bool reset_all              # If this is true then ignore parameter_index
+
+uint8 ORB_QUEUE_LENGTH = 4

msg/ParameterSetUsedRequest.msg

@@ -0,0 +1,6 @@
+# ParameterSetUsedRequest : Used by a remote to update the used flag for a parameter on the primary
+
+uint64 timestamp
+uint16 parameter_index
+
+uint8 ORB_QUEUE_LENGTH = 64

msg/ParameterSetValueRequest.msg

@@ -0,0 +1,11 @@
+# ParameterSetValueRequest : Used by a remote or primary to update the value for a parameter at the other end
+
+uint64 timestamp
+uint16 parameter_index
+
+int32 int_value             # Optional value for an integer parameter
+float32 float_value         # Optional value for a float parameter
+
+uint8 ORB_QUEUE_LENGTH = 32
+
+# TOPICS parameter_set_value_request parameter_remote_set_value_request parameter_primary_set_value_request

msg/ParameterSetValueResponse.msg

@@ -0,0 +1,9 @@
+# ParameterSetValueResponse : Response to a set value request by either primary or secondary
+
+uint64 timestamp
+uint64 request_timestamp
+uint16 parameter_index
+
+uint8 ORB_QUEUE_LENGTH = 4
+
+# TOPICS parameter_set_value_response parameter_remote_set_value_response parameter_primary_set_value_response