Remove Brewfile and check for uv in bootstrap script

uv should be installed via the standard installer, not Homebrew.
Bootstrap now checks for uv and directs users to the install docs.

Author: x

Brewfile

@@ -4,19 +4,10 @@ set -e
 
 cd "$(dirname "$0")/.."
 
-if [ -f "Brewfile" ] && [ "$(uname -s)" = "Darwin" ] && [ "$SKIP_BREW" != "1" ] && [ -t 0 ]; then
-  brew bundle check >/dev/null 2>&1 || {
-    echo -n "==> Install Homebrew dependencies? (y/N): "
-    read -r response
-    case "$response" in
-      [yY][eE][sS]|[yY])
-        brew bundle
-        ;;
-      *)
-        ;;
-    esac
-    echo
-  }
+if ! command -v uv &> /dev/null; then
+  echo "Error: uv is not installed."
+  echo "Install it from https://docs.astral.sh/uv/getting-started/installation/"
+  exit 1
 fi
 
 echo "==> Installing Python dependencies…"