Enable SPM support for Ext and configure pipelines for extensions target testing (#3)

* initial ext files

* add a workable version of spm for extensions

* update

* update pipeline

* update pipelines

* fix dev/release pipelines for extensions pod

* fix dev pipelines for extensions pod

* fix release pipelines for extensions pod

* fix dev  pipelines for extensions pod

* adding empty include folder for configuring extensions target path

* test

* test

* test

* revert pipeline changes

* revert gitignore changes

* add ext pod binary target for release pipeline

* add pipeline for extensions

* update

* update package.swift

* update latest from branch

* update

* fix

* fix

* update

* try dummy empty file

* test

* update package.swift to use fatalerror

* syntax

* try gitignore revert

* update gitignore

* add -list

* onnxruntime-Package

* update using onnxruntime-Package

* update dev pipeline

* fix dev pipelines

* syntax

* pull extensions/

* update pipelines again

* syntax

* variables

* fix

* fix -r

* update Package.swift

* update Package.swift

* minor update

* address pr comments

* minor updates

* fix

* refine messages

* syntax

* syntax again

* address pr comments partial

* address pr comments

* add .h header file and notes

* minor updates

* syncing objc source files and add code to register custom ops using function pointer

* format

* move to the header for function doc

---------

Co-authored-by: rachguo <rachguo@rachguos-Mini.attlocal.net>
Co-authored-by: rachguo <rachguo@rachguos-Mac-mini.local>

objectivec/ort_value_internal.h

@@ -9,9 +9,18 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface ORTValue ()
 
-- (nullable instancetype)initWithCAPIOrtValue:(OrtValue*)CAPIOrtValue
-                           externalTensorData:(nullable NSMutableData*)externalTensorData
-                                        error:(NSError**)error NS_DESIGNATED_INITIALIZER;
+/**
+ * Creates a value from an existing C++ API Ort::Value and takes ownership from it.
+ * Note: Ownership is guaranteed to be transferred on success but not otherwise.
+ *
+ * @param existingCXXAPIOrtValue The existing C++ API Ort::Value.
+ * @param externalTensorData Any external tensor data referenced by `existingCXXAPIOrtValue`.
+ * @param error Optional error information set if an error occurs.
+ * @return The instance, or nil if an error occurs.
+ */
+- (nullable instancetype)initWithCXXAPIOrtValue:(Ort::Value&&)existingCXXAPIOrtValue
+                             externalTensorData:(nullable NSMutableData*)externalTensorData
+                                          error:(NSError**)error NS_DESIGNATED_INITIALIZER;
 
 - (Ort::Value&)CXXAPIOrtValue;