fix(core): fix the value check for publishConfig.provenance (#6781)

## What's the problem this PR addresses?

This PR resolves an issue where the `publishConfig.provenance` field in
`package.json` wasn't being read correctly.

Specifically:
- When `publishConfig.provenance: true` was set in `package.json`,
Yarn's `npm publish` command wouldn't generate provenance statements
- Whilst the `PublishConfig` interface had `provenance?: boolean`
defined, the `load` method in `Manifest.ts` was missing the processing
logic for the `provenance` field when handling `publishConfig`
- Other fields (`access`, `main`, `module`, `browser`, `registry`,
`bin`, `executableFiles`) were being processed correctly, but
`provenance` was the only one being omitted

## How did you fix it?

I added the following code to the `publishConfig` processing section
within the `load` method in `packages/yarnpkg-core/sources/Manifest.ts`:

```typescript
if (typeof data.publishConfig.provenance === `boolean`)
  this.publishConfig.provenance = data.publishConfig.provenance;
```

This fix ensures:
1. The `publishConfig.provenance` field in `package.json` is read
correctly when it's a boolean value
2. It becomes available as `workspace.manifest.publishConfig.provenance`
3. The existing logic in `npm publish` command (`publish.ts` lines
109-120) functions properly

Additionally, to ensure the accuracy of the fix, I added test cases to
`packages/yarnpkg-core/tests/Manifest.test.ts`:
- Test for when `provenance: true` is set
- Test for when `provenance: false` is set
- Test to verify that non-boolean values are ignored

With this fix, when `publishConfig.provenance` is configured in
`package.json`, provenance statements will be generated as expected.

## Checklist

- [x] I have read the [Contributing
Guide](https://yarnpkg.com/advanced/contributing).
- [x] I have set the packages that need to be released for my changes to
be effective.
- [x] I will check that all automated PR checks pass before the PR gets
reviewed.

---------

Signed-off-by: Sora Morimoto <sora@morimoto.io>
Co-authored-by: Maël Nison <nison.mael@gmail.com>

Author: smorimoto

.yarn/versions/d2747135.yml

@@ -0,0 +1,35 @@
+releases:
+  "@yarnpkg/cli": patch
+  "@yarnpkg/core": patch
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-exec"
+  - "@yarnpkg/plugin-file"
+  - "@yarnpkg/plugin-git"
+  - "@yarnpkg/plugin-github"
+  - "@yarnpkg/plugin-http"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-jsr"
+  - "@yarnpkg/plugin-link"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/doctor"
+  - "@yarnpkg/extensions"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"

packages/yarnpkg-core/sources/Manifest.ts

@@ -523,6 +523,9 @@ export class Manifest {
       if (typeof data.publishConfig.registry === `string`)
         this.publishConfig.registry = data.publishConfig.registry;
 
+      if (typeof data.publishConfig.provenance === `boolean`)
+        this.publishConfig.provenance = data.publishConfig.provenance;
+
       if (typeof data.publishConfig.bin === `string`) {
         if (this.name !== null) {
           this.publishConfig.bin = new Map([[this.name.name, normalizeSlashes(data.publishConfig.bin)]]);

packages/yarnpkg-core/tests/Manifest.test.ts

@@ -55,4 +55,21 @@ describe(`Manifest`, () => {
       expect(manifest.exportTo({}).bin).toEqual({bin2: `./bin2.js`});
     });
   });
+
+  describe(`publishConfig`, () => {
+    it(`should parse provenance field when set to true`, () => {
+      const manifest = Manifest.fromText(`{ "publishConfig": { "provenance": true } }`);
+      expect(manifest.publishConfig?.provenance).toBe(true);
+    });
+
+    it(`should parse provenance field when set to false`, () => {
+      const manifest = Manifest.fromText(`{ "publishConfig": { "provenance": false } }`);
+      expect(manifest.publishConfig?.provenance).toBe(false);
+    });
+
+    it(`should ignore non-boolean provenance values`, () => {
+      const manifest = Manifest.fromText(`{ "publishConfig": { "provenance": "true" } }`);
+      expect(manifest.publishConfig?.provenance).toBeUndefined();
+    });
+  });
 });