Replace npm run relay with make relay everywhere

The make relay target merges split graphql files into a single
schema.graphql before running the Relay compiler. All CI workflows,
the generate target, and documentation now use make relay.

Signed-off-by: Émile Ré <emile@getprobo.com>

.github/workflows/make.yaml

@@ -27,7 +27,7 @@ jobs:
         with:
           go: "false"
       - run: "npm --workspace @probo/emails run build"
-      - run: "npm run relay"
+      - run: "make relay"
       - name: "Build console"
         run: |
           npm --workspace @probo/console run check
@@ -304,7 +304,7 @@ jobs:
           go: "false"
       - uses: reviewdog/action-setup@d8a7baabd7f3e8544ee4dbde3ee41d0011c3a93f # v1.5.0
       - name: "Generate Relay artifacts"
-        run: npm run relay
+        run: make relay
       - name: "Run eslint"
         env:
           REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}