Simplify OpenAPI Generator

[andrewdmontgomery]

Closes #

Description

This simplifies our OpenAPI Generator setup, and borrows from the work done in #486:

• Simplifies the generate command:
  • Calls: docker run --rm openapitools/openapi-generator-cli:"v7.5.0" generate
    • It fetches the official docker container instead of using the locally fetched generator in a custom docker container
    • The install-and-generate Makefile task has been removed, as it is no longer required
  • Generates all file types by default (instead of just models)
    • Uses .openapi-generator-ignore to selectively ignore which file/folders should be created
  • Passes new options to --additional-options
• Moves all openapi-generate activity into the opeapi directory
  • Files are generated here, and are copied elsewhere as needed
    • The swift5 generator supports outputing source files as a Swift Package. While we aren't using it as a Swift Package, using that folder structure feels more natural. So the generated source files are in Sources. They are then rsynced to their final destination

Note

After this PR merges, we will want to delete the openapi-generator directory in the root of the repo.

This PR no longer requires or uses the openapi-generator directory. That folder is currently ignored by git. But since we don't need this folder any more, this PR stops ignoring that folder.

Testing Steps

1. Make sure Docker is running locally
2. Run make generate

• OBSERVE:
  • Docker downloads the proper image (7.5.0) (only occurs the first time):

Unable to find image 'openapitools/openapi-generator-cli:v7.5.0' locally
v7.5.0: Pulling from openapitools/openapi-generator-cli
a5319f8e5f3f: Pull complete
d3aab5129936: Pull complete
b47927223c23: Pull complete
b2a3e41ae21b: Pull complete
914200ed739a: Pull complete
2b2d8033142b: Pull complete
505e99177f70: Pull complete
Digest: sha256:cdf11948948de9c21c6035de47dd5fc73c1651c8ba2ea0a4b86a527608ef52a9
Status: Downloaded newer image for openapitools/openapi-generator-cli:v7.5.0

• The only changes to source files in Sources/Gravatar/OpenApi/Generated should be the usual changes to access package --> public levels, which we are currently correcting by hand.

- package struct Avatar: Codable, Hashable, Sendable {
-    package enum Rating: String, Codable, CaseIterable, Sendable {
+ public struct Avatar: Codable, Hashable, Sendable {
+    public enum Rating: String, Codable, CaseIterable, Sendable {

[wpmobilebot]

📲 You can test the changes from this Pull Request in Gravatar UIKit Prototype Build by scanning the QR code below to install the corresponding build.

	App Name	Gravatar UIKit Prototype Build
	Build Number	1583
	Version	1.0
	Bundle ID	com.automattic.gravatar-sdk-demo-uikit.prototype-build
	Commit	1ef109a
	App Center Build	Gravatar SDK Demo - UIKit #299

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Gravatar SwiftUI Prototype Build by scanning the QR code below to install the corresponding build.

	App Name	Gravatar SwiftUI Prototype Build
	Build Number	1583
	Version	1.0
	Bundle ID	com.automattic.gravatar-sdk-demo-swiftui.prototype-build
	Commit	1ef109a
	App Center Build	Gravatar SDK Demo - SwiftUI #298

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[etoledom]

Looking great 🎉