Merge `package:test_process` (#2425)

- [x] Move and fix workflow files, labeler.yaml, and badges in the
README.md
- [x] Rev the version of the package, so that pub.dev points to the
correct site
- [x] Add a line to the changelog:
```
* Move to `dart-lang/test` monorepo.
```

- [x] Add the package to the top-level readme of the monorepo:
```
| [test_process](pkgs/test_process/) | Test processes: starting; validating stdout and stderr; checking exit code | [![package issues](https://img.shields.io/badge/package:test_process-4774bc)](https://github.com/dart-lang/tools/issues?q=is%3Aissue+is%3Aopen+label%3Apackage%3Atest_process) | [![pub package](https://img.shields.io/pub/v/test_process.svg)](https://pub.dev/packages/test_process) |
```

- [ ] **Important!** Merge the PR with 'Create a merge commit' (enabling
then disabling the `Allow merge commits` admin setting)
- [x] Update the auto-publishing settings on
https://pub.dev/packages/test_process/admin
- [x] Add the following text to
https://github.com/dart-lang/test_process/:'

```
> [!IMPORTANT]  
> This repo has moved to https://github.com/dart-lang/test/tree/master/pkgs/test_process
```

- [ ] Publish using the autopublish workflow
- [ ] Push tags to GitHub using
```
git tag --list 'test_process*' | xargs git push origin
```

- [ ] Close open PRs in dart-lang/test_process with the following
message:

```
Closing as the [dart-lang/test_process](https://github.com/dart-lang/test_process) repository is merged into the [dart-lang/test](https://github.com/dart-lang/test) monorepo. Please re-open this PR there!
```
      
- [ ] Transfer issues by running
```
dart run pkgs/repo_manage/bin/report.dart transfer-issues --source-repo dart-lang/test_process --target-repo dart-lang/test --add-label package:test_process --apply-changes
```

- [ ] Archive https://github.com/dart-lang/test_process/


---

- [x] I’ve reviewed the contributor guide and applied the relevant
portions to this PR.

<details>
  <summary>Contribution guidelines:</summary><br>

- See our [contributor
guide](https://github.com/dart-lang/.github/blob/main/CONTRIBUTING.md)
for general expectations for PRs.
- Larger or significant changes should be discussed in an issue before
creating a PR.
- Contributions to our repos should follow the [Dart style
guide](https://dart.dev/guides/language/effective-dart) and use `dart
format`.
- Most changes should add an entry to the changelog and may need to [rev
the pubspec package
version](https://github.com/dart-lang/sdk/blob/main/docs/External-Package-Maintenance.md#making-a-change).
- Changes to packages require [corresponding
tests](https://github.com/dart-lang/.github/blob/main/CONTRIBUTING.md#Testing).

Note that many Dart repos have a weekly cadence for reviewing PRs -
please allow for some latency before initial review feedback.
</details>
tree: 080a08836fa4dca0a996271fa13784445a26737c
  1. .github/
  2. integration_tests/
  3. pkgs/
  4. tool/
  5. .gitattributes
  6. .gitignore
  7. analysis_options.yaml
  8. CONTRIBUTING.md
  9. mono_repo.yaml
  10. pubspec.yaml
  11. README.md
README.md

Dart CI OpenSSF Scorecard

What's here?

Welcome! package:test is the standard testing library for Dart and Flutter. If you have questions about Dart testing, please see the docs for package:test. package:test_api and package:test_core are implementation details and generally not user-facing.

package:checks is a relatively new library for expressing test expectations. It's a more modern version of package:matcher and features a literate API.

Packages

PackageDescriptionVersion
checksA framework for checking values against expectations and building custom expectations.pub package
fake_asyncFake asynchronous events such as timers and microtasks for deterministic testing.pub package
matcherSupport for specifying test expectations via an extensible Matcher class.pub package
testA full featured library for writing and running Dart tests across platforms.pub package
test_apipub package
test_corepub package
test_processTest processes: starting; validating stdout and stderr; checking exit codepub package