chore: Added support for Swift Package Manager

[royjit]

Issue #, if available:

Description of changes:

Check points:

• Added new tests to cover change, if needed
• All unit tests pass
• All integration tests pass
• Documentation update for the change if required
• PR title conforms to conventional commit style

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #1123 (58da7b3) into main (0a6dcd5) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 58da7b3 differs from pull request most recent head 2ddde85. Consider uploading reports for the commit 2ddde85 to get more accurate results

@@            Coverage Diff             @@
##             main    #1123      +/-   ##
==========================================
- Coverage   58.99%   58.96%   -0.04%     
==========================================
  Files         652      652              
  Lines       19210    19210              
==========================================
- Hits        11333    11327       -6     
- Misses       7877     7883       +6     

Flag	Coverage Δ
API_plugin_unit_test	55.46% <ø> (-0.21%)	⬇️
AWSPluginsCore	76.56% <ø> (ø)
Amplify	48.02% <ø> (-0.05%)	⬇️
Analytics_plugin_unit_test	73.41% <ø> (ø)
Auth_plugin_unit_test	82.31% <ø> (ø)
DataStore_plugin_unit_test	73.85% <ø> (ø)
Predictions_plugin_unit_test	33.51% <ø> (ø)
Storage_plugin_unit_test	57.72% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...lugins/API/AWSAPICategoryPlugin/AWSAPIPlugin.swift	100.00% <ø> (ø)
...AWSAPICategoryPlugin/Core/AppSyncListPayload.swift	92.00% <ø> (ø)
...WSAPICategoryPlugin/Core/AppSyncListResponse.swift	100.00% <ø> (ø)
...SAPICategoryPlugin/Core/AppSyncModelMetadata.swift	76.78% <ø> (ø)
...oryPlugin/Support/Decode/GraphQLErrorDecoder.swift	70.73% <ø> (ø)
...ort/Decode/GraphQLResponseDecoder+DecodeData.swift	86.11% <ø> (ø)
...n/Support/Internal/AWSAppSyncGraphQLResponse.swift	86.00% <ø> (ø)
...itoAuthPlugin/AWSCognitoAuthPlugin+Configure.swift	84.21% <ø> (ø)
...th/AWSCognitoAuthPlugin/AWSCognitoAuthPlugin.swift	37.50% <ø> (ø)
...AuthPlugin/Dependency/AuthUserServiceAdapter.swift	78.62% <ø> (ø)
... and 32 more

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