[Bug - Swift] `segment` file does not observe `access-level: public` specified in `typewriter.yml`

[daveneff]

Bug report 🐞

Issue and steps to reproduce.

typewriter.yml file contains a parameter access-level, which allows users to specify which access level generated code should have. However, the generated file segment does not observe the provided access level - it always applies the internal access level.

This is problematic in cases where generated code is contained in a separate Package, as consumers are unable to access any of the generated functions on the extension of Analytics, since the access control cannot be made public.

Repro steps

1. Set the access-level: public in typewriter.yml:

   client:
     language: swift
     sdk: swift
     languageOptions:
       access-level: public
   

2. Run the codegen using npx typewriter
3. Observe that the file segment does not observe the specified public access level

Expected

In the generated file segment, extension Analytics should have the access level specified in typewriter.yml (in this case, public):

public extension Analytics {  
    // generated event functions
}

Actual

In the generated file segment, extension Analytics has an internal access level:

extension Analytics {
    // generated event functions
 }

Versions. (Typewriter, OS, language, etc.)

• Typewriter version: typewriter/9.1.0 darwin-arm64 node-v19.5.0
• Language: Swift