Start: Add check for uv

Uv is the definitive package installation tool for Python, so add
support to check for it via the start script.

Signed-off-by: kingbri <8082010+kingbri1@users.noreply.github.com>

start.sh

@@ -2,12 +2,24 @@
 
 cd "$(dirname "$0")" || exit
 
+if command -v uv >/dev/null 2>&1; then
+    HAS_UV=1
+else
+    HAS_UV=0
+fi
+
 if [ -n "$CONDA_PREFIX" ]; then
     echo "It looks like you're in a conda environment. Skipping venv check."
 else
     if [ ! -d "venv" ]; then
         echo "Venv doesn't exist! Creating one for you."
-        python3 -m venv venv
+
+        if [ "$HAS_UV" -eq 1 ]; then
+            echo "It looks like you're using uv. Running appropriate commands."
+            uv venv venv -p 3.12
+        else
+            python3 -m venv venv
+        fi
 
         if [ -f "start_options.json" ]; then
             echo "Removing old start_options.json"