Use UV to install server for speed, package locks in dev setup, workflows

It's much faster than pip, includes dependency locks via uv.lock and
comes with standard convenience utilities (e.g pipx, venv replacement)

.github/workflows/pypi.yml

@@ -34,13 +34,16 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up Python 3.11
-        uses: actions/setup-python@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
         with:
-          python-version: '3.11.12'
+          version: "latest"
+
+      - name: Set up Python 3.11
+        run: uv python install 3.11
 
       - name: ⬇️ Install Server
-        run: python -m pip install --upgrade pip && pip install --upgrade .
+        run: uv sync --all-extras
 
       - name: ⬇️ Install Web Client
         run: |
@@ -51,7 +54,7 @@ jobs:
       - name: 📂 Copy Generated Files
         run: |
           mkdir -p src/khoj/interface/compiled
-          cp -r /opt/hostedtoolcache/Python/3.11.12/x64/lib/python3.11/site-packages/khoj/interface/compiled/* src/khoj/interface/compiled/
+          cp -r $(uv python find-python 3.11)/lib/python3.11/site-packages/khoj/interface/compiled/* src/khoj/interface/compiled/
 
       - name: ⚙️ Build Python Package
         run: |
@@ -61,13 +64,13 @@ jobs:
           rm -rf dist
 
           # Build PyPI Package
-          pipx run build
+          uv build
 
       - name: 🌡️ Validate Python Package
         run: |
           # Validate PyPi Package
-          pipx run check-wheel-contents dist/*.whl --ignore W004
-          pipx run twine check dist/*
+          uv tool run check-wheel-contents dist/*.whl --ignore W004
+          uv tool run twine check dist/*
 
       - name: ⏫ Upload Python Package Artifacts
         uses: actions/upload-artifact@v4