fix: build rstest explicitly after install

Upstream moved `pnpm run build` out of rstest's root `prepare` script
(web-infra-dev/rstest@569c2ce), so `pnpm i` alone no longer builds rstest.
Mirror the rsbuild fix (#62): build rstest explicitly both as the subject
(build-rstest action) and as a consumer suite (tests/*/rstest.ts), so
@rstest/core ships its dist + type declarations and downstream tsc resolves it.

Author: fi3ework

.github/actions/build-rstest/action.yaml

@@ -40,3 +40,4 @@ runs:
       run: |
         cd ${{ inputs.path }}
         pnpm i
+        node --run build

tests/rsbuild/rstest.ts

@@ -6,6 +6,7 @@ export async function test(options: RunOptions) {
     ...options,
     repo: 'web-infra-dev/rstest',
     branch: process.env.RSTEST ?? 'main',
+    build: 'node --run build',
     // ignore snapshot changes
     test: ['test -u', 'test:examples'],
     beforeTest: async () => {

tests/rslib/rstest.ts

@@ -6,6 +6,7 @@ export async function test(options: RunOptions) {
     ...options,
     repo: 'web-infra-dev/rstest',
     branch: process.env.RSTEST ?? 'main',
+    build: 'node --run build',
     test: ['test', 'test:examples'],
     beforeTest: async () => {
       await $`pnpm exec playwright install chromium --with-deps`;

tests/rspack/rstest.ts

@@ -6,6 +6,7 @@ export async function test(options: RunOptions) {
     ...options,
     repo: 'web-infra-dev/rstest',
     branch: process.env.RSTEST ?? 'main',
+    build: 'node --run build',
     // ignore snapshot changes
     test: [
       'test -u',

tests/rspress/rstest.ts

@@ -6,6 +6,7 @@ export async function test(options: RunOptions) {
     ...options,
     repo: 'web-infra-dev/rstest',
     branch: process.env.RSTEST ?? 'main',
+    build: 'node --run build',
     beforeTest: async () => {
       cd('./website');
     },