ci: Optimize build + test pipeline

.github/workflows/build-python-package.yml

@@ -0,0 +1,33 @@
+name: Build Argilla package
+
+on:
+  workflow_call:
+
+jobs:
+  build:
+    name: Build the python package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code 🛎
+        uses: actions/checkout@v2
+      - name: Cache pip 👜
+        uses: actions/cache@v3
+        env:
+          # Increase this value to reset cache if pyproject.toml has not changed
+          CACHE_NUMBER: 0
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ env.CACHE_NUMBER }}-${{ hashFiles('pyproject.toml') }}
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: "14"
+      - name: Build Package 🍟
+        run: |
+          pip install -U build
+          scripts/build_distribution.sh
+      - name: Upload package artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: python-package
+          path: dist

.github/workflows/check-repo-files.yml

@@ -0,0 +1,39 @@
+name: Check repository files
+
+on:
+  workflow_call:
+    outputs:
+      pythonChanges:
+        description: "True if some files in python code have changed"
+        value: ${{ jobs.check-repo-files.outputs.pythonChanges }}
+      buildChanges:
+        description: "True if some files affecting the build have changed"
+        value: ${{ jobs.check-repo-files.outputs.pythonChanges }}
+
+jobs:
+  check-repo-files:
+    name: Check repo files
+    runs-on: ubuntu-latest
+    outputs:
+      pythonChanges: ${{ steps.path_filter.outputs.pythonChanges }}
+      buildChanges: ${{ steps.path_filter.outputs.buildChanges }}
+    steps:
+      - name: Checkout Code 🛎
+        uses: actions/checkout@v2
+      - name: Check affected files
+        uses: dorny/paths-filter@v2
+        id: path_filter
+        with:
+          filters: |
+            pythonChanges:
+              - 'src/**'
+              - 'tests/**'
+              - 'pyproject.toml'
+              - 'setup.py'
+            buildChanges:
+              - 'src/**'
+              - 'frontend/**'
+              - 'pyproject.toml'
+              - 'setup.py'
+              - 'docker/**'
+              - '.dockerignore'