TEMPORARY: Build CI against PSES PR #2298

Point the `PowerShellEditorServices` checkout at the coupled PR branch
`andyleejordan/lm-tools-command-explorer` so #5508's new language model
tool tests run against the server contract they depend on (name/module
filtering on `getCommand`, `showHelp` returning `helpText`).

Must be reverted before merge — once PSES #2298 lands on `main`, the
default checkout passes.

Drafted by Copilot (Claude Opus 4.8).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: andyleejordan

.github/workflows/ci-test.yml

@@ -28,6 +28,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           repository: PowerShell/PowerShellEditorServices
+          # TEMPORARY: test against the coupled PSES PR #2298 until it merges.
+          # Revert this `ref` before merging (see PR #5508).
+          ref: andyleejordan/lm-tools-command-explorer
           path: PowerShellEditorServices
 
       - name: Checkout vscode-powershell