[ios][prebuild] build swift package from prebuild script

[chrfalch]

Summary:

This commit adds building the swift package from the prebuild script:

• Added swiftpackage.js for building the swift package
• Added calling building from the main script
• Added configurable build type from the main script.
• Removed params in jsdoc from the link method

Changelog:

[IOS] [ADDED] - Added building swift package from the prebuild script

Test Plan:

Run prebuild script and verify that the Swift package is successfully built.