feat: Add zero-copy SharedArray type to Frame Processor Plugins (#2383)

* feat: Create `TypedArray` class for Frame Processor Plugins

* Type

* feat: Pass `VisionCameraProxy` along (BREAKING)

* feat: Finish implementation

* Log a bit

* feat: Successfully convert JSI <> JNI buffers

* Wrap buffer

* fix: Fix using wrong Runtime

* feat: Add docs

* add zero copy example

* Format C++

* Create iOS base

* feat: Finish iOS implementation

* chore: Format

* fix: Use `NSData` instead of `NSMutableData`

* Format

* fix: Fix build when Frame Processors are disabled

* chore: Rename `TypedArray` to `SharedArray`

* fix: Fix Swift typings for Array

* Remove a few default inits

* fix: Fix Android build

* fix: Use `NSInteger`

* Update SharedArray.mm

* fix: Expose bytes directly on iOS (NSData was immutable)

package/ios/Frame Processor/SharedArray.h

@@ -0,0 +1,48 @@
+//
+//  SharedArray.h
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 12.01.24.
+//  Copyright © 2024 mrousavy. All rights reserved.
+//
+
+#pragma once
+
+#import "VisionCameraProxy.h"
+#import <Foundation/Foundation.h>
+
+#ifdef __cplusplus
+#import "JSITypedArray.h"
+#import <jsi/jsi.h>
+using namespace facebook;
+#endif
+
+// Needs to be in sync with JSITypedArray.h as the index is used
+typedef NS_ENUM(NSInteger, SharedArrayType) {
+  Int8Array,
+  Int16Array,
+  Int32Array,
+  Uint8Array,
+  Uint8ClampedArray,
+  Uint16Array,
+  Uint32Array,
+  Float32Array,
+  Float64Array,
+};
+
+@interface SharedArray : NSObject
+
+- (instancetype _Nonnull)init NS_UNAVAILABLE;
+
+- (instancetype _Nonnull)initWithProxy:(VisionCameraProxyHolder* _Nonnull)proxy type:(SharedArrayType)type size:(NSInteger)size;
+
+#ifdef __cplusplus
+- (instancetype _Nonnull)initWithRuntime:(jsi::Runtime&)runtime typedArray:(std::shared_ptr<vision::TypedArrayBase>)typedArray;
+
+- (std::shared_ptr<vision::TypedArrayBase>)typedArray;
+#endif
+
+@property(nonatomic, readonly, nonnull) uint8_t* data;
+@property(nonatomic, readonly) NSInteger count;
+
+@end