Keep docs up-to-date with changes around plugin-compat

.github/ISSUE_TEMPLATE/compatibility.md

@@ -27,7 +27,7 @@ Some other important notes:
 
 - If the `packageExtensions` entries you have to add are widely relevant, consider opening up a
   PR to add them to our builtin extension list!
-  https://github.com/yarnpkg/berry/blob/master/packages/plugin-compat/sources/extensions.ts#L11
+  https://github.com/yarnpkg/berry/blob/master/packages/yarnpkg-extensions/sources/index.ts#L11
 
 - The Rulebook is our reference resource, explaining why proper dependency listings are important
   not only for Yarn, but for all package managers. We recommend referencing it in your upstream issues.

packages/docusaurus/docs/getting-started/migration.md

@@ -132,7 +132,7 @@ Should you use dependencies or peer dependencies? It depends on the context; as
 
 ### Use `yarn dlx` instead of `yarn global`
 
-Managing system-wide packages is outside of the scope of Yarn, so [`yarn global` has been removed](https://github.com/yarnpkg/berry/issues/821). We however still provide `yarn dlx` to run one off scripts. 
+Managing system-wide packages is outside of the scope of Yarn, so [`yarn global` has been removed](https://github.com/yarnpkg/berry/issues/821). We however still provide `yarn dlx` to run one off scripts.
 
 ### Call binaries using `yarn run` rather than `node_modules/.bin`
 
@@ -279,4 +279,4 @@ Although rare, some packages don't list all their dependencies. Now that we enfo
 
 The long term fix is to submit a pull request upstream to add the missing dependency to the package listing. Given that it sometimes might take some time before they get merged, we also have a more short-term fix available: create `.yarnrc.yml` in your project, then use the [`packageExtensions` setting](#fix-dependencies-with-packageextensions) to add the missing dependency to the relevant packages. Run `yarn install` to apply your changes, and voilà!
 
-Should you choose to open a PR on the upstream repository, you will also be able to contribute your package extension to our [compat plugin](https://github.com/yarnpkg/berry/blob/master/packages/plugin-compat/sources/extensions.ts), helping the whole ecosystem move forward.
+Should you choose to open a PR on the upstream repository, you will also be able to contribute your package extension to our [`plugin-compat` database](https://github.com/yarnpkg/berry/blob/master/packages/plugin-compat/sources/extensions.ts), helping the whole ecosystem move forward.

packages/gatsby/content/getting-started/migration.md

@@ -331,4 +331,4 @@ packageExtensions:
         optional: true
 ```
 
-If you also open a PR on the upstream repository you will also be able to contribute your package extension to our [compat plugin](https://github.com/yarnpkg/berry/blob/master/packages/plugin-compat/sources/extensions.ts), helping the whole ecosystem move forward.
+If you also open a PR on the upstream repository you will also be able to contribute your package extension to our [`plugin-compat` database](https://github.com/yarnpkg/berry/blob/master/packages/yarnpkg-extensions/sources/index.ts), helping the whole ecosystem move forward.

packages/plugin-compat/README.md

@@ -8,8 +8,7 @@ This plugin is included by default in Yarn.
 
 ## Compatibility Features
 
-- Various [extensions](/configuration/yarnrc#packageExtensions) are enabled by default (full list [here](https://github.com/yarnpkg/berry/blob/master/packages/plugin-compat/sources/extensions.ts))
+- Various [extensions](/configuration/yarnrc#packageExtensions) are enabled by default (full list [here](https://github.com/yarnpkg/berry/blob/master/packages/yarnpkg-extensions/sources/index.ts))
 - [`fsevents`](/packages/plugin-compat/extra/fsevents): Makes fsevents aware of the virtual filesystem: [#692](https://github.com/yarnpkg/berry/pull/692)
 - [`typescript`](/packages/plugin-compat/extra/typescript): Auto-merge of [#35206](https://github.com/microsoft/TypeScript/pull/35206)
 - [`resolve`](/packages/plugin-compat/extra/resolve): Implements [`normalize-options.js`](https://github.com/browserify/resolve/pull/174)
-