feat: added pitch bend support

src/core/region/KGMidiRegion.ts

@@ -1,6 +1,7 @@
 import { Expose, Type } from 'class-transformer';
 import { KGRegion } from './KGRegion';
 import { KGMidiNote } from '../midi/KGMidiNote';
+import { KGMidiPitchBend } from '../midi/KGMidiPitchBend';
 
 /**
  * KGMidiRegion - Class representing a MIDI region in the DAW
@@ -14,6 +15,10 @@ export class KGMidiRegion extends KGRegion {
   @Type(() => KGMidiNote)
   protected notes: KGMidiNote[] = [];
 
+  @Expose()
+  @Type(() => KGMidiPitchBend)
+  protected pitchBends: KGMidiPitchBend[] = [];
+
   constructor(id: string, trackId: string, trackIndex: number, name: string, startFromBeat: number = 0, length: number = 0) {
     super(id, trackId, trackIndex, name, startFromBeat, length);
     this.__type = 'KGMidiRegion';
@@ -29,6 +34,14 @@ export class KGMidiRegion extends KGRegion {
     this.notes = notes;
   }
 
+  public getPitchBends(): KGMidiPitchBend[] {
+    return this.pitchBends;
+  }
+
+  public setPitchBends(pitchBends: KGMidiPitchBend[]): void {
+    this.pitchBends = pitchBends;
+  }
+
   // Add a single note
   public addNote(note: KGMidiNote): void {
     this.notes.push(note);
@@ -39,6 +52,14 @@ export class KGMidiRegion extends KGRegion {
     this.notes = this.notes.filter(note => note.getId() !== noteId);
   }
 
+  public addPitchBend(pitchBend: KGMidiPitchBend): void {
+    this.pitchBends.push(pitchBend);
+  }
+
+  public removePitchBend(pitchBendId: string): void {
+    this.pitchBends = this.pitchBends.filter(pitchBend => pitchBend.getId() !== pitchBendId);
+  }
+
   // Override getCurrentType to return specific subclass type
   public override getCurrentType(): string {
     return 'KGMidiRegion';