Start: Rewrite start scripts

Start scripts now don't update dependencies by default due to mishandling
caches from pip. Also add dedicated update scripts and save options
to a JSON file instead of a text one.

Signed-off-by: kingbri <bdashore3@proton.me>

update_scripts/update_deps.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+cd "$(dirname "$0")/.." || exit
+
+if [ -n "$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! Please run start.sh instead."
+        exit 0
+    fi
+
+    echo "Activating venv"
+
+    # shellcheck source=/dev/null
+    source venv/bin/activate
+fi
+
+python3 start.py --update-deps "$@"