Add workflow to check pip install dbt-metricflow.

Author: plypaul

.github/workflows/ci-pip-install.yaml

@@ -0,0 +1,27 @@
+name: Check installing currently published `dbt-metricflow` using `pip`
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+jobs:
+
+  metricflow-pip-install-tests:
+    name: MetricFlow `pip` install tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ "3.9", "3.12" ]
+    steps:
+
+      - name: Check-out the repo
+        uses: actions/checkout@v4
+
+      - name: Setup Python ${{ matrix.python-version }} Environment
+        uses: ./.github/actions/setup-python-env
+        with:
+          python-version: "${{ matrix.python-version }}"
+
+      - name: Run `pip install dbt-metricflow`
+        run: "pip install dbt-metricflow"