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)

scripts/dev_setup.sh

@@ -29,7 +29,13 @@ if [ "$DEVCONTAINER" = true ]; then
     # PATH should already include /opt/venv/bin from Dockerfile
 
     # Install khoj in editable mode (dependencies already installed)
-    python3 -m pip install -e '.[dev]'
+    # Use uv if available, else fall back to pipx
+    if command -v uv &> /dev/null
+    then
+        uv sync --all-extras
+    else
+        python3 -m pip install -e '.[dev]'
+    fi
 
     # Install Web App using cached dependencies
     echo "Installing Web App using cached dependencies..."
@@ -39,7 +45,14 @@ else
     # Standard setup
     echo "Installing Server App..."
     cd "$PROJECT_ROOT"
-    python3 -m venv .venv && . .venv/bin/activate && python3 -m pip install -e '.[dev]'
+    if command -v uv &> /dev/null
+    then
+        uv venv
+        uv sync --all-extras
+    else
+        python3 -m venv .venv && . .venv/bin/activate
+        python3 -m pip install -e '.[dev]'
+    fi
 
     echo "Installing Web App..."
     cd "$PROJECT_ROOT/src/interface/web"