Adopt galaxy-api-client into the client pnpm workspace

Adds client/pnpm-workspace.yaml so that pnpm install from client/
resolves galaxy-api-client as a workspace member. The per-package
client/packages/api-client/pnpm-lock.yaml goes away in favor of the
single client/pnpm-lock.yaml covering the whole workspace.

CI is simplified to a single install step, then workspace-filtered
build/test/publish invocations (pnpm --filter @galaxyproject/galaxy-api-client).

This is the first real workspace member; the packages/* glob is ready
to accept extractions (galaxy-utils, galaxy-ui, galaxy-composables) in
follow-up PRs.

.github/workflows/client-api-test.yaml

@@ -3,11 +3,15 @@ on:
   push:
     paths:
       - 'client/packages/api-client/**'
+      - 'client/pnpm-workspace.yaml'
+      - 'client/pnpm-lock.yaml'
       - 'client/src/api/**'
       - '.github/workflows/client-api-test.yaml'
   pull_request:
     paths:
       - 'client/packages/api-client/**'
+      - 'client/pnpm-workspace.yaml'
+      - 'client/pnpm-lock.yaml'
       - 'client/src/api/**'
       - '.github/workflows/client-api-test.yaml'
 concurrency:
@@ -31,15 +35,12 @@ jobs:
         uses: pnpm/action-setup@v5
         with:
           package_json_file: client/package.json
-      - name: Install client dependencies
+      - name: Install workspace dependencies
         run: pnpm install --frozen-lockfile
         working-directory: client
-      - name: Install client-api dependencies
-        run: pnpm install --frozen-lockfile
-        working-directory: client/packages/api-client
       - name: Build client-api
-        run: pnpm run build
-        working-directory: client/packages/api-client
+        run: pnpm --filter @galaxyproject/galaxy-api-client run build
+        working-directory: client
       - name: Run client-api tests
-        run: pnpm test
-        working-directory: client/packages/api-client
+        run: pnpm --filter @galaxyproject/galaxy-api-client test
+        working-directory: client

.github/workflows/publish_artifacts.yaml

@@ -127,8 +127,8 @@ jobs:
         run: npm run sync-version
         working-directory: 'client/packages/api-client'
       - name: build client-api
-        run: pnpm install && pnpm run build
-        working-directory: 'client/packages/api-client'
+        run: pnpm --filter @galaxyproject/galaxy-api-client run build
+        working-directory: 'client'
       - name: publish client-api
         if: (github.event_name == 'workflow_dispatch' && inputs.release_type == 'release') || (github.event_name == 'release' && !github.event.release.prerelease)
         run: npm publish --provenance --access public

client/pnpm-workspace.yaml

@@ -0,0 +1,2 @@
+packages:
+  - "packages/*"