feat(configs): add updated python venv source function

shell-configs/shell/functions/functions_python.sh

@@ -0,0 +1,18 @@
+sact() {
+    if [ -n "$1" ]; then
+        venvs_to_try=("$1")
+    else
+        venvs_to_try=("venv" ".venv")
+    fi
+
+    for venv in "${venvs_to_try[@]}"; do
+        if [ -d "$venv" ]; then
+            echo "Activating '$venv'..."
+            source "$venv/bin/activate"
+            return 0
+        fi
+    done
+
+    echo "Error: No virtual environment found ('$(IFS=', '; echo "${venvs_to_try[*]}")')."
+    return 1
+}