Add iOS bindings to ExecuTorch (#39)

## Description
This PR provides a bridge between native ExecuTorch iOS API and
TypeScript. It allows to perform basic ET operations such as running
methods from arrays and loading them.

### Type of change
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update (improves or adds clarity to existing
documentation)

### Tested on
- [x] iOS
- [ ] Android

### Testing instructions
<!-- Provide step-by-step instructions on how to test your changes.
Include setup details if necessary. -->

### Screenshots
<!-- Add screenshots here, if applicable -->

### Related issues
<!-- Link related issues here using #issue-number -->

### Checklist
- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings

### Additional notes
<!-- Include any additional information, assumptions, or context that
reviewers might need to understand this PR. -->

ios/LLaMARunner.xcframework/Info.plist → ios/ExecutorchLib.xcframework/Info.plist

@@ -6,33 +6,33 @@
 	<array>
 		<dict>
 			<key>BinaryPath</key>
-			<string>LLaMARunner.framework/LLaMARunner</string>
+			<string>ExecutorchLib.framework/ExecutorchLib</string>
 			<key>LibraryIdentifier</key>
-			<string>ios-arm64-simulator</string>
+			<string>ios-arm64</string>
 			<key>LibraryPath</key>
-			<string>LLaMARunner.framework</string>
+			<string>ExecutorchLib.framework</string>
 			<key>SupportedArchitectures</key>
 			<array>
 				<string>arm64</string>
 			</array>
 			<key>SupportedPlatform</key>
 			<string>ios</string>
-			<key>SupportedPlatformVariant</key>
-			<string>simulator</string>
 		</dict>
 		<dict>
 			<key>BinaryPath</key>
-			<string>LLaMARunner.framework/LLaMARunner</string>
+			<string>ExecutorchLib.framework/ExecutorchLib</string>
 			<key>LibraryIdentifier</key>
-			<string>ios-arm64</string>
+			<string>ios-arm64-simulator</string>
 			<key>LibraryPath</key>
-			<string>LLaMARunner.framework</string>
+			<string>ExecutorchLib.framework</string>
 			<key>SupportedArchitectures</key>
 			<array>
 				<string>arm64</string>
 			</array>
 			<key>SupportedPlatform</key>
 			<string>ios</string>
+			<key>SupportedPlatformVariant</key>
+			<string>simulator</string>
 		</dict>
 	</array>
 	<key>CFBundlePackageType</key>

ios/ExecutorchLib.xcframework/ios-arm64-simulator/ExecutorchLib.framework/Headers/ETModel.h

@@ -0,0 +1,17 @@
+#ifndef ETModel_hpp
+#define ETModel_hpp
+
+#import <UIKit/UIKit.h>
+
+@interface ETModel : NSObject
+
+- (NSNumber *)loadModel:(NSString *)filePath;
+- (NSNumber *)loadMethod:(NSString *)methodName;
+- (NSNumber *)loadForward;
+- (NSArray *)forward:(NSArray *)input
+               shape:(NSArray *)shape
+           inputType:(NSNumber *)inputType;
+
+@end
+
+#endif // ETModel_hpp

ios/LLaMARunner.xcframework/ios-arm64/LLaMARunner.framework/Headers/LLaMARunner.h → ios/ExecutorchLib.xcframework/ios-arm64-simulator/ExecutorchLib.framework/Headers/LLaMARunner.h

@@ -3,7 +3,7 @@
  * All rights reserved.
  *
  * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the ExecuTorch repository - https://github.com/pytorch/executorch/blob/main/LICENSE.
+ * LICENSE file in the root directory of this source tree.
  */
 
 #import <UIKit/UIKit.h>

ios/ExecutorchLib.xcframework/ios-arm64/ExecutorchLib.framework/Headers/ETModel.h

@@ -0,0 +1,17 @@
+#ifndef ETModel_hpp
+#define ETModel_hpp
+
+#import <UIKit/UIKit.h>
+
+@interface ETModel : NSObject
+
+- (NSNumber *)loadModel:(NSString *)filePath;
+- (NSNumber *)loadMethod:(NSString *)methodName;
+- (NSNumber *)loadForward;
+- (NSArray *)forward:(NSArray *)input
+               shape:(NSArray *)shape
+           inputType:(NSNumber *)inputType;
+
+@end
+
+#endif // ETModel_hpp

ios/LLaMARunner.xcframework/ios-arm64-simulator/LLaMARunner.framework/Headers/LLaMARunner.h → ios/ExecutorchLib.xcframework/ios-arm64/ExecutorchLib.framework/Headers/LLaMARunner.h

@@ -3,7 +3,7 @@
  * All rights reserved.
  *
  * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the ExecuTorch repository - https://github.com/pytorch/executorch/blob/main/LICENSE.
+ * LICENSE file in the root directory of this source tree.
  */
 
 #import <UIKit/UIKit.h>