babel: Include "transform-optional-chaining" in presets.

We need to include this "transform-optional-chaining" for babel presets
to prevent an error related to optional chaining syntax when we convert
this module to typescript. This error is a bug which is present in the
unmaintained `babel-plugin-rewire-ts` plugin.

web/babel.config.js

@@ -15,6 +15,7 @@ module.exports = {
             "@babel/preset-env",
             {
                 corejs: "3.31",
+                include: ["transform-optional-chaining"],
                 shippedProposals: true,
                 useBuiltIns: "usage",
             },