chore(react-18-tests-v8): follow same pattern with type-check as in v…

…9 when using path aliases

apps/react-18-tests-v8/README.md

@@ -21,3 +21,20 @@ This file and process will be replaced with Storybook once we are able to get st
 ```
 
 Add test files for React 18 issues that have been triaged and resolved so that we do not regress.
+
+### `type-check`
+
+To be able to type-check cross React versions we need all v8 libraries build up front so we don't type check all v8 implementation rather public API surface.
+
+For that purpose we use `tsconfig.react-compat-check.json` as target for `type-check` npm script task, which disables path aliases and forces `tsc` to consume linked monorepo build packages.
+
+**Local machine flow:**
+
+```sh
+lage build --to @fluentui/react-18-tests-v8
+yarn workspace @fluentui/react-18-tests-v8 type-check
+```
+
+**CI:**
+
+lage defines `build` targets to be executed prior to `type-check`.

apps/react-18-tests-v8/tsconfig.react-compat-check.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.app.json",
+  "compilerOptions": {
+    "noEmit": true,
+    "paths": {}
+  }
+}