This PR resolves the problem of dropped progress updates and ensures the
accuracy of the information provided in the progress bar. Additionally,
it adds the displaying of the finished state to the progress bar.
Requires merging and tagging
https://github.com/apple/containerization/pull/91.
This PR resolves warnings:
```
…/.build/checkouts/swift-docc-plugin/Plugins/Swift-DocC Preview/Symbolic Links/SwiftDocCPluginUtilities/BuildGraph/DocumentationBuildGraph.swift:106:17: warning: capture of non-sendable type 'Target.Type' in an isolated closure
104 | // Copy the closure and the target into a block operation object
105 | let new = BlockOperation { [work, task] in
106 | work(task)
| `- warning: capture of non-sendable type 'Target.Type' in an isolated closure
107 | }
108 | operationsByID[task.id] = new
…/.build/checkouts/swift-docc-plugin/Plugins/Swift-DocC Preview/Symbolic Links/SwiftDocCPluginUtilities/BuildGraph/DocumentationBuildGraph.swift:105:41: warning: capture of non-sendable type 'Target.Type' in an isolated closure
103 | }
104 | // Copy the closure and the target into a block operation object
105 | let new = BlockOperation { [work, task] in
| `- warning: capture of non-sendable type 'Target.Type' in an isolated closure
106 | work(task)
107 | }
```
Dmitry Kovba