fix: process list patch values in http requests

This commit parses values from post request as well as always serializes
values for the web interface

package/share/ahriman/templates/build-status/package-info-modal.jinja2

@@ -163,7 +163,7 @@
         const variableValueInput = document.createElement("input");
         variableValueInput.classList.add("form-control");
         variableValueInput.readOnly = true;
-        variableValueInput.value = variable.value;
+        variableValueInput.value = JSON.stringify(variable.value);
 
         const variableButtonRemove = document.createElement("button");
         variableButtonRemove.type = "button";