Add swift6 generator (OpenAPITools#19621)

* [Swift6] create Swift6 generator

* [Swift6] create Swift6 generator

* Update vapor integration

* Update bitrise stack to Xcode 16

* [Swift6] tryped throws

* [Swift6] tryped throws

* [Swift6] combine deferred and api static method

* [Swift6] update readme

* [Swift6] fix some errors

* [Swift6] fix some errors

* [Swift6] fix some errors

* [Swift6] update docs

* [Swift6] update docs

* Use multiline comments for examples in csharp generator (OpenAPITools#19079)

* multi

* gen

* Uncomment File::deleteOnExit (OpenAPITools#19624)

* [Core/Rust Server] Check references in additionalProperties correctly when checking freeForm status (OpenAPITools#19605)

* Check references in additionalProperties correctly

Handle references in additionalProperties correctly when determining free-form status

* Update samples

* [Rust Server] Handle arrays in forms (OpenAPITools#19625)

* [Rust Server] Handle arrays in forms correctly

* [Rust Server] Add tests

* Update samples

* [Swift6] fix CI

* [Swift6] fix CI

* [Swift6] fix CI

* [Swift6] fix CI

---------

Co-authored-by: Liri S <reallyliri@gmail.com>
Co-authored-by: Beppe Catanese <1771700+gcatanese@users.noreply.github.com>
Co-authored-by: Richard Whitehouse <git@richardwhiuk.com>
Co-authored-by: William Cheng <wing328hk@gmail.com>

Author: 5 people

README.md

@@ -1049,6 +1049,7 @@ Here is a list of template creators:
    * Swift 3: @hexelon
    * Swift 4: @ehyche
    * Swift 5: @4brunu
+   * Swift 6: @4brunu
    * Swift Combine: @dydus0x14
    * TypeScript (Angular1): @mhardorf
    * TypeScript (Angular2): @roni-frantchi

bin/configs/swift6-alamofireLibrary.yaml

@@ -0,0 +1,12 @@
+generatorName: swift6
+outputDir: samples/client/petstore/swift6/alamofireLibrary
+library: alamofire
+inputSpec: modules/openapi-generator/src/test/resources/2_0/swift/petstore-with-fake-endpoints-models-for-testing.yaml
+templateDir: modules/openapi-generator/src/main/resources/swift6
+generateAliasAsModel: true
+useCustomDateWithoutTime: true
+additionalProperties:
+  podAuthors: ""
+  podSummary: PetstoreClient
+  projectName: PetstoreClient
+  podHomepage: https://github.com/openapitools/openapi-generator