Reorganize top-level directories with clearer naming convention

app -> app-desktop-macos, presets -> app-presets, server -> remote-server,
daw-config-reaper -> osc-config-daw, plugin-reaper-realearn -> plugin-reaper-relearn.
Updated run.py and presets.py path references accordingly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

plugin-reaper-relearn/api/src/runtime/instance_info_event.rs

@@ -0,0 +1,24 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Eq, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(tag = "kind")]
+pub enum InstanceInfoEvent {
+    Generic(GenericInstanceInfoEvent),
+    /// If attempting to MIDI-learn but the track is either not armed or the input monitoring mode
+    /// is not suitable.
+    MidiLearnFromFxInputButTrackNotArmed,
+    MidiLearnFromFxInputButTrackHasAudioInput,
+}
+
+impl InstanceInfoEvent {
+    pub fn generic(message: impl Into<String>) -> Self {
+        Self::Generic(GenericInstanceInfoEvent {
+            message: message.into(),
+        })
+    }
+}
+
+#[derive(Clone, Eq, PartialEq, Debug, Serialize, Deserialize)]
+pub struct GenericInstanceInfoEvent {
+    pub message: String,
+}